@article{Herrmann, author = {Herrmann, Frank}, title = {Automatisierte Durchf{\"u}hrung von Bestandsmanagement-Projekten}, series = {wt Werkstattstechnik online}, journal = {wt Werkstattstechnik online}, number = {10}, address = {Berlin}, pages = {819 -- 824}, abstract = {Ein effizientes und effektives Bestandsmanagement ist wichtig, um die Auswirkungen etwa durch fehlende Produkte gering zu halten und die Lagerhaltungskosten zu minimieren. Die f{\"u}r viele Unternehmen geeigneten Formeln zum Bestandsmanagement und seine produktspezifische Anwendung werden in einem Leitfaden zusammengefasst und anhand eines realen Anwendungsfalls in diesem Fachbeitrag beschrieben. Eine manuelle Durchf{\"u}hrung ist besonders aufwendig. Deshalb wird erl{\"a}utert, welche Schritte des Leitfadens effektiv durch ein entsprechendes Programm durchgef{\"u}hrt werden k{\"o}nnen.}, subject = {Bestandsmanagement}, language = {de} } @article{HerrmannBurgmayr, author = {Herrmann, Frank and Burgmayr, Georg}, title = {Verkn{\"u}pfung von Software zu einem IT-Logistiknetzwerk}, series = {MaschinenMarkt online}, journal = {MaschinenMarkt online}, publisher = {Vogel Business Media}, address = {W{\"u}rzburg}, abstract = {Softwaresysteme sind f{\"u}r den Betrieb moderner Logistik- und Herstellungsbetriebe essenziell. Doch kaum eine auf dem Markt angebotene L{\"o}sung kann alle Anforderungen in Lager und Montage l{\"u}ckenlos abdecken. Kleine und mittlere IT-Unternehmen schließen sich zusammen - und damit diese Marktl{\"u}cke.}, subject = {Logistikunternehmen}, language = {de} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Evaluierung von Standardsoftware zur Abbildung von Gesch{\"a}ftsprozessen}, series = {Herausforderungen an die Wirtschaftsinformatik: Wissensmanagement, E-Business und ereignisgesteuerte Gesch{\"a}ftsprozesse in Echtzeit}, booktitle = {Herausforderungen an die Wirtschaftsinformatik: Wissensmanagement, E-Business und ereignisgesteuerte Gesch{\"a}ftsprozesse in Echtzeit}, editor = {Fuchs, Gerhard and M{\"u}ller, Christian and Ritz, Harald and Saint-Mont, Uwe}, publisher = {Verlag News \& Media}, address = {Berlin}, doi = {10.15771/978-3-936527-10-0}, pages = {52 -- 69}, language = {de} } @inproceedings{HerrmannStumvoll, author = {Herrmann, Frank and Stumvoll, Ulrike}, title = {Einstellung von Losgr{\"o}ßenheuristiken in ERP- bzw. PPS-Systemen}, series = {Proceedings zu den 7. Wismarer Wirtschaftsinformatik-Tagen vom 3.-4. Juni 2010 an der Hochschule Wismar}, booktitle = {Proceedings zu den 7. Wismarer Wirtschaftsinformatik-Tagen vom 3.-4. Juni 2010 an der Hochschule Wismar}, subject = {PPS}, language = {de} } @inproceedings{ClausHerrmann, author = {Claus, Thorsten and Herrmann, Frank}, title = {Simulation als betriebliche Entscheidungshilfe}, series = {Erg{\"a}nzungsband zu den Proceedings zur 14. ASIM Fachtagung "Simulation in Produktion und Logistik", vom 6. bis 8. Oktober 2010 am Karlsruher Institut f{\"u}r Technologie, Karlsruhe}, booktitle = {Erg{\"a}nzungsband zu den Proceedings zur 14. ASIM Fachtagung "Simulation in Produktion und Logistik", vom 6. bis 8. Oktober 2010 am Karlsruher Institut f{\"u}r Technologie, Karlsruhe}, subject = {Produktion}, language = {de} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Berechnung des Werts von Informationen im Supply Chain Management}, series = {Tagungsband zum 100. MNU-Bundeskongress ; Regensburg, 5. bis 9. April 2009}, booktitle = {Tagungsband zum 100. MNU-Bundeskongress ; Regensburg, 5. bis 9. April 2009}, organization = {Deutscher Verein zur F{\"o}rderung des Mathematischen und Naturwissenschaftlichen Unterrichts}, subject = {Supply Chain Management}, language = {de} } @article{WohankaHerrmann, author = {Wohanka, Christian and Herrmann, Frank}, title = {Anbindung von Halbleiter Fertigungsautomaten an die SAP NetWeaver Plattform}, series = {Industrie-Management}, journal = {Industrie-Management}, number = {2}, publisher = {Gito Verlag}, address = {Bremen}, pages = {39 -- 42}, subject = {Fertigung}, language = {de} } @article{HeindlHerrmann, author = {Heindl, Martina and Herrmann, Frank}, title = {Verk{\"u}rzung von Ein- und Auslagerzeiten in Lagerprozessen}, series = {PPS-Management}, volume = {12}, journal = {PPS-Management}, number = {4}, publisher = {GITO Verlag}, address = {Berlin}, pages = {47 -- 50}, subject = {Lagerhaltung}, language = {de} } @book{Herrmann, author = {Herrmann, Frank}, title = {Operative Planung in IT-Systemen f{\"u}r die Produktionsplanung und -steuerung}, publisher = {Vieweg+Teubner}, isbn = {978-3-8348-8172-4}, doi = {10.1007/978-3-8348-8172-4}, abstract = {Die operative Planung in der Produktionslogistik besteht im Kern aus der Prognose von Bedarfen, dem Management von Lagerbest{\"a}nden, der Planung des Produktionsprogramms, der Materialbedarfsplanung und der Fertigungssteuerung. Kommerziell verf{\"u}gbare Enterprise Resource Planning-Systeme oder Produktionsplanungs- und -steuerungssysteme bieten hierf{\"u}r sehr viele Verfahren mit vielen Einstellungsm{\"o}glichkeiten an, die in diesem Buch detailliert erl{\"a}utert werden. Die ausf{\"u}hrlichen Beispiele und Fallstudien erleichtern das Nachvollziehen der Einzelschritte dieser Verfahren. Die Alternativen haben zum Teil signifikante Auswirkungen auf Parameter wie Termineinhaltung, Durchlaufzeit und Kapitalbindung, die das Erreichen der Unternehmensziele maßgeblich beeinflussen. Zur Unterst{\"u}tzung von Anwendern wird die Wirkung dieser Einstellungsm{\"o}glichkeiten analysiert und es werden Hinweise bzw. Leitf{\"a}den zu ihrer Einstellung gegeben.}, subject = {Enterprise-Resource-Planning}, language = {de} } @inproceedings{VitzthumClausHerrmann, author = {Vitzthum, Thorsten and Claus, Thorsten and Herrmann, Frank}, title = {Can Aggregate Production Planning (APP) be modified to be as good as Master Production Scheduling (MPS)}, series = {ACC Journal}, volume = {23}, booktitle = {ACC Journal}, number = {2}, doi = {10.15240/tul/004/2017-2-012}, pages = {155 -- 162}, abstract = {In diesem Beitrag wird anhand einer Fallstudie die Bedeutung der Hauptproduktionsprogrammplanung (HPPLAN) f{\"u}r die hierarchische Produktionsplanung herausgearbeitet werden. Dazu wird versucht das Ergebnis der aggregierten Gesamtplanung (AGGRPLAN) durch Ver{\"a}nderung einzelner Paramater so zu verbessern, dass es dem Ergebnis der HPPLAN entspricht. Im Rahmen der Untersuchungen konnten dabei Verbesserungen f{\"u}r einzelne Planungssituationen erzielt werden, eine generelle L{\"o}sung konnte jedoch nicht gefunden werden. Insbesondere der Einsatz eines geeigneten Kapazit{\"a}tsreduktionsfaktors in Verbindung mit der Ber{\"u}cksichtigung der Durchlaufzeit f{\"u}hrt zu einer Verbesserung der L{\"o}sung. Bei der Planung von mehr als einem Produkt ist allerdings schwierig einen geeigneten Kapazit{\"a}tsreduktionsfaktor zu finden, da dieser abh{\"a}ngig von der Nachfrage ist.}, subject = {Hierarchische Produktionsplanung}, language = {en} } @book{Herrmann, author = {Herrmann, Frank}, title = {Logik der Produktionslogistik}, publisher = {Oldenbourg}, isbn = {978-3-486-84856-4}, abstract = {F{\"u}r kosteneffiziente und flexible Produktionsprozesse wurden und werden zunehmend ausgefeilte Verfahren eingesetzt. Sie entstammen dem Operations Research, der, deswegen, nach wie vor eine hohe Produktivit{\"a}t aufweist. Diese Verfahren berufen sich auf grundlegende Resultate der Produktionslogistik, die sich beweisen lassen und daher zeitlos g{\"u}ltig sind. Ihre Kenntnis ist f{\"u}r das Verst{\"a}ndnis und die Einsatzm{\"o}glichkeiten, insbesondere die Grenzen, dieser Verfahren erforderlich. Es erlaubt auch die grundlegenden St{\"a}rken und Schw{\"a}chen von manchen aktuell diskutierten Ans{\"a}tzen zu analysieren. Die Konzepte und Verfahren werden im Detail begr{\"u}ndet bzw. hergeleitet; dies schließt die Beweise ein, die {\"u}berwiegend aus dem Internet heruntergeladen werden k{\"o}nnen. Zum schrittweisen Nachvollziehen der Konzepte und der Einzelschritte der Verfahren dienen die ausf{\"u}hrlich erl{\"a}uterten Beispiele. Das Buch richtet sich an Studierende der Wirtschaftswissenschaften, der Wirtschaftsinformatik und dem Operations Research sowie an Experten und Wissenschaftler, die sich f{\"u}r die Theorie zur Produktionslogistik interessieren. St{\"a}rken und Schw{\"a}chen von aktuell diskutierten Ans{\"a}tzen aufdecken.}, subject = {Fertigungslogistik}, language = {de} } @inproceedings{TrostTeichClausetal., author = {Trost, Marco and Teich, Enrico and Claus, Thorsten and Herrmann, Frank}, title = {Master Production Scheduling and the relevance of included social criteria}, series = {ACC Journal}, volume = {23}, booktitle = {ACC Journal}, number = {3}, doi = {10.15240/tul/004/2017-2-011}, pages = {146 -- 154}, abstract = {Folgender Beitrag untersucht die Notwendigkeit einer Ber{\"u}cksichtigung von Mitarbeiterauslastungen und davon abh{\"a}ngiger Bearbeitungszeiten in der Hauptproduktionsprogrammplanung. Zudem wird aufgezeigt, dass dieses Themengebiet aktuell eine Forschungsl{\"u}cke darstellt. Aus diesem Grund wird ein selbst entwickeltes lineares Optimierungsmodell f{\"u}r die Hauptproduktionsprogrammplanung vorgestellt, welches soziale Kriterien und eine geeignete Fallstudie enth{\"a}lt. Die Ergebnisse verdeutlichen, dass erhebliche Abweichungen durch eine Ignoranz von Mitarbeiterauslastungen und davon abh{\"a}ngiger Bearbeitungszeiten entstehen. Deshalb ist eine Integration zu empfehlen. Allerdings wird auch deutlich, dass weitere Forschungen notwendig sind, speziell f{\"u}r die Bestimmung geeigneter Ersch{\"o}pfungsfunktionen, so wie beispielsweise Funktionen f{\"u}r Lerneffekte existieren.}, subject = {Fertigungsprogrammplanung}, language = {en} } @inproceedings{TrostClausHerrmann, author = {Trost, Marco and Claus, Thorsten and Herrmann, Frank}, title = {Adapted Master Production Scheduling: Potential for Improving Human Working Conditions}, series = {Proceedings of the 33th European Conference on Modelling and Simulation 2019 (ECMS), Caserta, Italy}, volume = {33,1}, booktitle = {Proceedings of the 33th European Conference on Modelling and Simulation 2019 (ECMS), Caserta, Italy}, doi = {10.7148/2019}, pages = {310 -- 316}, abstract = {This article illustrates the problem of deficient working conditions like high work intensity and underlines the possibilities of production planning and control to improve them. However, an included literature search presents that previous approaches have predominantly considered social aspects within a short planning horizon and that there is a need for a long-term consideration. To address this research gap a linear optimization model for Master Production Scheduling is presented, which has been extended by basic aspects of personnel requirements planning and a control of personnel work intensity. The results show that improvements in working conditions can be achieved through adapted production planning without an automatically increase in costs. However , challenges in quantifying the corresponding social correlations are identified as well.}, subject = {Produktionsplanung}, language = {en} } @inproceedings{VitzthumClausHerrmann, author = {Vitzthum, Thorsten and Claus, Thorsten and Herrmann, Frank}, title = {Einfluss von Mitarbeiterqualifikationszeiten im Rahmen nachhaltiger Produktionsplanung}, series = {Simulation in Produktion und Logistik 2017, Kassel, 20.-22. September}, booktitle = {Simulation in Produktion und Logistik 2017, Kassel, 20.-22. September}, pages = {315 -- 324}, abstract = {This research paper evaluates the potential of reducing shortages and costs that are created by training measures as an example for measurement of extended qualification of key employees in sustainable production planning. Capacity planning with standard methods in Enterprise Resource Planning Systems, namely priority rules, are used. Almost always, the optimal solution is not found, although there is one. In addition, unnecessarily high stocks are built up. In real business situations, this causes lost profits.}, subject = {Enterprise-Resource-Planning}, language = {de} } @inproceedings{ForstnerStauberHerrmann, author = {Forstner, Robert and Stauber, Stephan and Herrmann, Frank}, title = {Simulationsstudie zur sequentiellen Beh{\"a}lterversorgung in der automatischen Intralogistik}, series = {Simulation in Produktion und Logistik 2017, September 20 - 22, 2017, Kassel, Germany}, booktitle = {Simulation in Produktion und Logistik 2017, September 20 - 22, 2017, Kassel, Germany}, pages = {489 -- 498}, abstract = {After explaining the necessity of sequential sorting processes within branched conveyor systems and introducing basic sequential controlling principles, this paper analyses with a simulation study different ways of implementing sequential supply processes for small load carriers in an abstracted automated intralogistics system. Simulation results show that a layout with sequencing systems with explicit buffer places can ensure much higher sequential throughput performances than a layout with a loop for sequencing or a layout which implements sequencing processes just with the control of carrier sources. Because of sequential control dependencies in the layout with buffer places, further experiments for sequential supply processes with different layouts forms have to be assessed.}, subject = {F{\"o}rderanlage}, language = {de} } @article{JanssenDiabatSaueretal., author = {Janssen, Larissa and Diabat, Ali and Sauer, J{\"u}rgen and Herrmann, Frank}, title = {A stochastic micro-periodic age-based inventory replenishment policy for perishable goods}, series = {Transportation Research Part E: Logistics and Transportation}, volume = {118}, journal = {Transportation Research Part E: Logistics and Transportation}, number = {October}, publisher = {Elsevier}, doi = {10.1016/j.tre.2018.08.009}, pages = {445 -- 465}, abstract = {In this paper, we propose a micro-periodic inventory replenishment policy for quickly perishable goods with fixed and known lifetime of items, deterministic lead time, fixed given order cycle, mixed issuing policies (FIFO and LIFO), age-based stock, imperfect items and target customer service level under random demand. The inventory policy is based on time of day (morning, midday, afternoon or evening). The results of our simulation study show that the proposed micro-periodic inventory policy leads to waste reduction of 66\% as well as a partial decrease in cost compared to inventory policy with planning on a daily basis.}, subject = {Frischware}, language = {en} } @article{TrostTeichClausetal., author = {Trost, Marco and Teich, Enrico and Claus, Thorsten and Herrmann, Frank}, title = {Ein lineares Optimierungsmodell zur Hauptproduktionsprogrammplanung mit Ber{\"u}cksichtigung sozialer Gr{\"o}ßen}, series = {uwf UmweltWirtschaftsForum}, volume = {25}, journal = {uwf UmweltWirtschaftsForum}, doi = {10.1007/s00550-017-0454-7}, pages = {71 -- 80}, abstract = {Aufgrund weniger existenter sozialorientierter Forschungen im Rahmen der Produktionsplanung und -steuerung stellt dieser Beitrag ein lineares Optimierungsmodell f{\"u}r die Hauptproduktionsprogrammplanung vor, welches soziale Kriterien ber{\"u}cksichtigt. Erste Ergebnisse deuten an, dass geringe Kosten nicht durch eine maximierte Mitarbeiterauslastung entstehen sondern durch geringe Kapazit{\"a}tsschwankungen.}, subject = {Hierarchische Produktionsplanung}, language = {de} } @book{ClausHerrmannTeich, author = {Claus, Thorsten and Herrmann, Frank and Teich, Enrico}, title = {Kostensimulation}, publisher = {Springer Gabler}, address = {Wiesbaden}, isbn = {978-3-658-25167-3}, doi = {10.1007/978-3-658-25168-0}, subject = {Kostenanalyse}, language = {de} } @inproceedings{TrostClausTeichetal., author = {Trost, Marco and Claus, Thorsten and Teich, Enrico and Selmair, Maximilian and Herrmann, Frank}, title = {Social and Ecological Capabilities for a sustainable Hierarchical Production Planning}, series = {Proceedings of the 30th EUROPEAN Conference on Modeling and Simulation (ECMS 2016), May 31st - June 3rd, 2016, Regensburg, Germany}, booktitle = {Proceedings of the 30th EUROPEAN Conference on Modeling and Simulation (ECMS 2016), May 31st - June 3rd, 2016, Regensburg, Germany}, doi = {10.7148/2016-0432}, abstract = {Production planning and production control mainly focus on optimising the entire production system of a company. On the basis of hierarchical planning as a suitable method for solving this task, this paper shows - besides the economic dimension taken into account so far - that there are also social and ecological effects which will have to be considered in the process of planning. For this purpose, we would like to indicate here which social and ecological parameters can be or have already been taken into account for master production scheduling, for lot sizing and resource scheduling. As a result, an overview has been created which presents the existing concepts of sustainable production planning and production control as well as the existing deficits regarding the sustainability perspective.}, subject = {Hierarchische Produktionsplanung}, language = {en} } @inproceedings{JanssenHerrmannClaus, author = {Janssen, Larissa and Herrmann, Frank and Claus, Thorsten}, title = {Beitrag zur Abfallreduktion mittels mathematischer Optimierung und simulationsbasierter Validierung}, series = {Proceedings of the 16th International Conference on Simulation in Production and Logistics, September 23 - 25, 2015, Dortmund, Germany}, booktitle = {Proceedings of the 16th International Conference on Simulation in Production and Logistics, September 23 - 25, 2015, Dortmund, Germany}, abstract = {Perishable goods with a shelf life of 3-5 days require frequent inventory controls in the food retail trade. Maintaining a high service level for these products in stores is difficult due to demand uncertainty. A high service level often leads to a lot of stock in stores. In case it is not sold, it is waste. As an approach towards waste volume reduction, the economic order quantity (EOQ) problem is optimised in combination with the delivery frequency problem on the basis of the microperiods, i.e. morning, midday, afternoon, and evening. The presented model is designed for multiple stores with one regional warehouse. The simulation model measures the waste volume in stores. Experiments show that the combined optimisation of both problems leads to a reduction of total costs and waste volume.}, subject = {Bestandsmanagement}, language = {de} } @inproceedings{SelmairHerrmannClausetal., author = {Selmair, Maximilian and Herrmann, Frank and Claus, Thorsten and Teich, Enrico}, title = {Potential of Reducing the Total Energy Consumption by Scheduling a Jobshop Production System}, series = {Proceedings of the 16th International Conference on Simulation in Production and Logistics, September 23 - 25, 2015, Dortmund, Germany}, booktitle = {Proceedings of the 16th International Conference on Simulation in Production and Logistics, September 23 - 25, 2015, Dortmund, Germany}, pages = {375 -- 384}, abstract = {This research paper has evaluated the potential of reducing energy consumption by scheduling jobshop production systems with machines using standby modes in free times. The initial introduction of the planning issue is followed by a description of the approach to assess the available potential. Subsequently, the research procedure by means of simulation, a detailed discussion of the results and a perspective on future research is given. Moreover, the notion that scheduling influences the energy consumption in jobshop production systems is supported. The presented simulation research also documents that there is no direct correlation between energy consumption and total lead time, although this was presumed usually. Finally, this paper provides a forecast for a possible optimisation model as well as an exemplary model with an energy-optimised schedule plan.}, subject = {Produktionsplanung}, language = {en} } @inproceedings{SelmairClausTrostetal., author = {Selmair, Maximilian and Claus, Thorsten and Trost, Marco and Bley, Andreas and Herrmann, Frank}, title = {Job Shop Scheduling with Flexible Energy Prices}, series = {Proceedings of the 30th EUROPEAN Conference on Modeling and Simulation, May 31st - June 3rd, 2016, Regensburg, Germany}, booktitle = {Proceedings of the 30th EUROPEAN Conference on Modeling and Simulation, May 31st - June 3rd, 2016, Regensburg, Germany}, doi = {10.7148/2016-0488}, abstract = {The rising energy prices - particularly over the last decade - pose a new challenge for the manufacturing industry. Reactions to climate change, such as the advancement of renewable energies, raise the expectation of further price increases and variations. Regarding the manufacturing industry, production planning and controlling can have a significant influence on the in-plant energy consumption. In this paper, we develop a scheduling method as a linear optimization model with the objective to minimize energy costs in a job shop production system.}, subject = {Job Shop Scheduling}, language = {en} } @inproceedings{HerrmannLangeManitz, author = {Herrmann, Frank and Lange, Frederick and Manitz, Michael}, title = {Order release within hierarchical production planning and control using product specific clearing functions}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2014 (OR 2014), Aachen, September 2 - 5, 2014, Germany}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2014 (OR 2014), Aachen, September 2 - 5, 2014, Germany}, subject = {Hierarchische Produktionsplanung}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Schrittweise Verbesserung des Realbetriebs einer Produktionslinie mit simultanem Produktionsfortschritt}, series = {Tagungsband zu "Wissenstransfer in der Wirtschaftsinformatik" im Rahmen der MKWI 2016; vom 09. bis 11. M{\"a}rz 2016 an der Technischen Universit{\"a}t Ilmenau in Th{\"u}ringen}, booktitle = {Tagungsband zu "Wissenstransfer in der Wirtschaftsinformatik" im Rahmen der MKWI 2016; vom 09. bis 11. M{\"a}rz 2016 an der Technischen Universit{\"a}t Ilmenau in Th{\"u}ringen}, pages = {19 -- 26}, language = {de} } @inproceedings{HerrmannManitz, author = {Herrmann, Frank and Manitz, Michael}, title = {Some remarks to the shape of Clearing Functions}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2015 (OR 2015) Wien, September 1 - 4}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2015 (OR 2015) Wien, September 1 - 4}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Observations to Clearing Functions}, series = {Proceedings of the 28th EURO Conference on Operations Research, July 12 - 15, 2015, Glasgow, Scotland}, booktitle = {Proceedings of the 28th EURO Conference on Operations Research, July 12 - 15, 2015, Glasgow, Scotland}, language = {en} } @book{Herrmann, author = {Herrmann, Frank}, title = {{\"U}bungsbuch - Losbildung und Fertigungssteuerung}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, isbn = {978-3-658-21567-5}, doi = {10.1007/978-3-658-21567-5}, pages = {IX, 341}, abstract = {Das Aufgabenbuch erg{\"a}nzt die in Lehrb{\"u}chern erl{\"a}uterten Verfahren der Losbildung und Fertigungssteuerung durch sehr detaillierte und pr{\"a}zise L{\"o}sungen. Losbildung und Fertigungssteuerung sind zentrale Kernelemente der operativen Produktionsplanung und -steuerung, insbesondere in kommerziell verf{\"u}gbaren IT-Systemen. Daher sind diese Verfahren integrale Bestandteile von Veranstaltungen zur Produktion und Logistik, Produktionsplanung und -steuerungsysteme, Supply Chain Management usw. in Bachelor- und Masterstudieng{\"a}ngen an Hochschulen und Universit{\"a}ten. Zu Beginn einer L{\"o}sung wird die verwendete Methodik soweit dargestellt, dass diese mit den in entsprechenden Vorlesungen gelehrten Inhalten ohne weitere Literatur verst{\"a}ndlich ist. Einige Themen, wie die Betrachtung von knappen Kapazit{\"a}ten und von schwankenden Durchlaufzeiten, gehen {\"u}ber den Inhalt von Standardlehrb{\"u}chern hinaus und d{\"u}rften auch f{\"u}r Doktoranden interessant sein.}, subject = {Produktionsplanung}, language = {de} } @book{HerrmannManitz, author = {Herrmann, Frank and Manitz, Michael}, title = {Materialbedarfsplanung und Ressourcenbelegungsplanung}, publisher = {Springer Gabler}, address = {Wiesbaden}, isbn = {978-3-658-12543-1}, doi = {10.1007/978-3-658-12543-1}, pages = {VII, 357}, subject = {Materialbedarf}, language = {de} } @article{Herrmann, author = {Herrmann, Frank}, title = {SIM-R/3: Softwaresystem zur Simulation der Regelung produktionslogistischer Prozesse durch das R/3-System der SAP AG}, series = {Wirtschaftsinformatik}, volume = {49}, journal = {Wirtschaftsinformatik}, number = {2}, doi = {10.1007/s11576-007-0034-5}, pages = {127 -- 133}, abstract = {State of the art in enterprises is the control of business processes by enterprise resource planning systems (ERP systems) such as the R/3 system of SAP AG. A typical task in the implementation phase of ERP systems consists in the choice of an appropriate lot sizing procedure and the setup of its parameters. The existing procedures do not deliver the best results for each business process. So, a business specific setup is required. Unfortunately, there is no knowledge of good parameter settings for typical business processes. Therefore, different parameter settings have to be tested out on real business processes over long periods (e. g. over several years). Of course, such an approach fails due to time restrictions. In addition, the literature argues that an automated software process — contrary to a physical process — is often never called in question or further optimized. An alternative offers a simulation of business processes which is controlled by an ERP system. In the laboratory of information science and production logistics (LIP) at the University of Applied Sciences, Regensburg, a pilot implementation of a system for simulating the control of production processes by the SAP R/3-System (SIM-R/3) was developed. SIM-R/3 allows such a simulation over long periods.}, subject = {Fertigungslogistik}, language = {de} } @inproceedings{HerrmannLangeAlmeder, author = {Herrmann, Frank and Lange, Frederick and Almeder, Christian}, title = {Capacity estimation based on clearing functions for the capacitated lot-sizing problem}, series = {Proceedings of the 5th International Workshop on Lot-Sizing, August 26th - 29th, 2014, Porto, Portugal}, booktitle = {Proceedings of the 5th International Workshop on Lot-Sizing, August 26th - 29th, 2014, Porto, Portugal}, abstract = {Single-stage capacitated lot-sizing problems (CLSP) are essential for manyplanning tasks in production systems. Due to the hierarchical planning approach, which is widely used in industrial practice and implemented in commercial enterprise resource planning as well as production planning and controlsystems, a subsequent scheduling is necessary to gain executable productionplans. Capacity consumption depends on many factors as, for example, systems workload, machine availability, or yield. Thus, a feasible and optimalsolution of the CLSP may lead to unplanned delays after sequencing and processing the orders on the shop floor. Using a so called clearing function (CF),which represents the relationship between the workload and the output of a production system, this capacity consumption in a CLSP is improved in various ways and tested on a real-world application.}, subject = {Hierarchische Produktionsplanung}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Genetic algorithm with simulation for scheduling of a flow shop with simultaneously loaded stations}, series = {Proceedings of the 28th EUROPEAN Conference on Modeling and Simulation, May 27th - 30th, 2014, Brescia, Italy}, booktitle = {Proceedings of the 28th EUROPEAN Conference on Modeling and Simulation, May 27th - 30th, 2014, Brescia, Italy}, abstract = {In this study, a real world flow shop with a transportation restriction is regarded. This restriction reduces the set of feasible schedules even more than the no-buffer restrictions discussed in the literature in the case of limited storage. Still this problem is NP-hard. Since this scheduling problem is integrated in the usual hierarchical planning, the tardiness is minimised. Compared to even specific priority rule for this class of problems the suggested genetic algorithm delivers significant better results. The specific structure of this class of problems complicates the calculation of the performance criteria. This is solved by a simulation algorithm. Proceedings 28th European Conference on Modelling and Simulation.}, subject = {Ablaufplanung}, language = {en} } @misc{Herrmann, author = {Herrmann, Frank}, title = {Simulation der Regelung von Unternehmensprozessen durch ein Enterprise Ressource Planning System am Beispiel von SAP R/3}, publisher = {Verlag der Hochschule Nordhausen}, language = {de} } @article{HerrmannTsakpinisWiedermann, author = {Herrmann, Frank and Tsakpinis, Athanassios and Wiedermann, Wolfgang}, title = {Praxisnahe Ausbildung an der FH-Regensburg mit dem Schwerpunkt SAP}, series = {Krcmar, Helmut; Rautenstrauch, Claus; Wittges, Holger und Schrader; Heino (Hrsg.): Wirtschaftsinformatik-Ausbildung mit SAP®-Software}, journal = {Krcmar, Helmut; Rautenstrauch, Claus; Wittges, Holger und Schrader; Heino (Hrsg.): Wirtschaftsinformatik-Ausbildung mit SAP®-Software}, publisher = {Josef Eul Verlag}, address = {Lohmar - K{\"o}ln}, subject = {Hochschulstudium}, language = {de} } @techreport{WohankaHelmstreitHerrmann, author = {Wohanka, Christian and Helmstreit, Herbert and Herrmann, Frank}, title = {Anbindung von Halbleiter Fertigungsautomaten an die SAP NetWeaver Plattform}, series = {Forschungsbericht der Hochschule Regensburg}, journal = {Forschungsbericht der Hochschule Regensburg}, publisher = {Weka Info Verlag}, address = {Regensburg}, pages = {51 -- 58}, subject = {Fertigung}, language = {de} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Simulated Determination and Usage of a Clearing Function for Leadtime Estimation}, series = {Proceedings of the 27th EURO Conference on Operations Research, July 13 - 18, 2014, Barcelona, Spain}, booktitle = {Proceedings of the 27th EURO Conference on Operations Research, July 13 - 18, 2014, Barcelona, Spain}, language = {en} } @techreport{HerrmannKreutz, author = {Herrmann, Frank and Kreutz, Michael}, title = {Simulations-System f{\"u}r das R/3-System (SIM-R/3) der SAP AG}, series = {Forschungsbericht der Hochschule Regensburg}, journal = {Forschungsbericht der Hochschule Regensburg}, publisher = {Weka Info Verlag}, address = {Regensburg}, pages = {46 -- 50}, subject = {SAP R/3}, language = {de} } @techreport{HeindlHerrmannJuraske, author = {Heindl, Martina and Herrmann, Frank and Juraske, Erich}, title = {Simulation von Einlagerstrategien}, series = {Forschungsbericht der Hochschule Regensburg}, journal = {Forschungsbericht der Hochschule Regensburg}, publisher = {Weka Info Verlag}, address = {Regensburg}, pages = {30 -- 39}, subject = {Lagerhaltung}, language = {de} } @article{Herrmann, author = {Herrmann, Frank}, title = {Scheduling a flow shop with simultaneously loaded stations: A real world application}, series = {Journal of Control Science and Engineering}, volume = {3}, journal = {Journal of Control Science and Engineering}, doi = {10.17265/2328-2231/2015.03.004}, pages = {147 -- 163}, abstract = {Companies use special designed flow shops, in order to satisfy specific demands. Products need to be transported (from one station to the next station) by a crane and the way of working of this crane excludes the intermediate storage (of a work piece). In addition, the way of working restricts the set of feasible schedules even more than the no-buffer restriction discussed in the literature in the case of limited storage. Since this scheduling problem is integrated in the usual hierarchical planning, the tardiness is minimised. A linear optimisation model is presented to provide a formal description of this NP-hard problem. It is also used to explain the performance of priority rule based heuristic solutions on small test problems. In detail, priority rules as well as a priority rule based branch and bound procedure are analysed; priority rules are regarded, because a priority rule is still the standard procedure for on-line scheduling in industrial practise. Out of successful priority rules in the literature the best one is identified by an extensive simulative investigation. An improved look-ahead is realised by a restricted search over all possible schedules.}, subject = {Fließfertigung}, language = {en} } @inproceedings{VitzthumHerrmann, author = {Vitzthum, Thorsten and Herrmann, Frank}, title = {Evidence of the Relevance of Master Production Scheduling for Hierarchical Production Planning.}, series = {Proceedings, 31st European Conference on Modelling and Simulation (ECMS) 2017, 23rd - May 26th, Budapest, Hungary}, booktitle = {Proceedings, 31st European Conference on Modelling and Simulation (ECMS) 2017, 23rd - May 26th, Budapest, Hungary}, isbn = {978-0-9932440-4-9}, doi = {10.7148/2017-0475}, abstract = {This paper deals with the significance of master production scheduling for hierarchical production planning. Production planning in a typical manufacturing organization is a sequence of complex decisions which depends on a number of factors, such as number of products, complexity of products, number of production sites, and number of work centres in each production site. The main idea in hierarchical production planning is to break down larger problems into smaller, more manageable sub problems. Starting with aggregate production planning, the benefits of using master production scheduling for material requirements planning will be conveyed. The main benefit of master production scheduling is more detailed planning. The production groups are thereby disaggregated into final products and the production site disaggregated into work centres. In order to plan capacities, resource profiles are used. By working with resource profiles production lead time data are taken into account to provide time-phased projections of the capacity requirements for each work centre (Vollmann et al. 2005). The case study will show that more accurate planning and consideration of production lead time through master production scheduling results in a demand program that can be realized without shortages or delays.}, subject = {Hierarchische Produktionsplanung}, language = {en} } @inproceedings{AmannHerrmannLutzetal., author = {Amann, Matthias and Herrmann, Frank and Lutz, Christian and Meier, Markus}, title = {Grad der Zerst{\"o}rung f{\"u}r eine lokale Suche bei einer taktgetriebenen Fließfertigung}, series = {Prozesse, Technologien, Anwendungen, Systeme und Management. Angewandte Forschung in der Wirtschaftsinformatik. Tagungsband zur 27. AKWI-Fachtagung vom 07. bis 10.09.2014 an der Oberbayerischen Technischen Hochschule Regensburg}, booktitle = {Prozesse, Technologien, Anwendungen, Systeme und Management. Angewandte Forschung in der Wirtschaftsinformatik. Tagungsband zur 27. AKWI-Fachtagung vom 07. bis 10.09.2014 an der Oberbayerischen Technischen Hochschule Regensburg}, editor = {Barton, Thomas and Erdlenbruch, Burkhard and Herrmann, Frank and M{\"u}ller, Christian}, publisher = {Verlag News \& Media}, address = {Berlin}, pages = {44 -- 54}, abstract = {Unternehmen produzieren oftmals viele Varianten f{\"u}r ein kleines Kundensegment und in kleinen St{\"u}ckzahlen auf sehr teuren Produktionsanlagen. Deren effiziente und effektive Nutzung erfordert eine m{\"o}glichst gute Planung der Belegung der Stationen mit Auftr{\"a}gen. Sehr wirkungsvoll bei Fertigungslinien sind lokale Suchverfahren. Sie erzielen ein lokales Optimum. Um ein globales Optimum zu erreichen, wird die Suche von einem anderen Punkt des Suchraums fortgesetzt. Dabei sollte kein willk{\"u}rlicher Punkt gew{\"a}hlt werden, sondern nur ein Teil des lokalen Optimums zerst{\"o}rt werden. Unterschiedlich starke Zerst{\"o}rungen werden f{\"u}r eine taktgetriebene Fließfertigung analysiert.}, subject = {Fließvertigung}, language = {de} } @inproceedings{LangeHerrmannClaus, author = {Lange, Frederick and Herrmann, Frank and Claus, Thorsten}, title = {Simulation based capacity estimation for a model of order release planning under the consideration of service levels}, series = {Proceedings of the 15th International Conference on Simulation in Production and Logistics, October 9 - 11, 2013, Paderborn, Germany}, booktitle = {Proceedings of the 15th International Conference on Simulation in Production and Logistics, October 9 - 11, 2013, Paderborn, Germany}, isbn = {978-0-9564944-6-7}, pages = {741 -- 747}, abstract = {Clearing Functions describe the nonlinear relationship between the orders which are in process and the output in capacitated productions systems under high utilization. These Clearing Function can be derived analytical by using steady-state queuing models or empirical by using simulation. We show how to estimate a Clearing Function for a single-level multi-product production system by using a simulation model. This non-linear Clearing Function is integrated into a model of order release planning. We extend this model to consider the uncertainty of the demand by using a Beta service level. We compare our model with an inventory management policy under different demand conditions.}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Simulation based priority rules for scheduling of a flow shop with simultaneously loaded stations}, series = {Proceedings of the 27th EUROPEAN Conference on Modeling and Simulation, May 27th - 30th, 2013, {\AA}lesund, Norway}, booktitle = {Proceedings of the 27th EUROPEAN Conference on Modeling and Simulation, May 27th - 30th, 2013, {\AA}lesund, Norway}, doi = {10.7148/2013-0775}, pages = {775 -- 781}, abstract = {In this study, a real world flow shop with a transportation restriction is regarded. This restriction reduces the set of feasible schedules even more than the no-buffer restrictions discussed in the literature in the case of limited storage. Since this scheduling problem is integrated in the usual hierarchical planning, the tardiness is minimised. This NP-hard problem is solved by priority rules, because of the addressed dynamic environment (and a high number of jobs) at the company site. Due to the technological restrictions the real duration of a job is significantly larger than its net processing time. By a simulation of the processing time many priority rules are improved and some even significantly. With extensive simulations successful priority rules in the literature are analysed.}, subject = {Hierarchische Produktionsplanung}, language = {en} } @inproceedings{MetlickaDavendraHerrmannetal., author = {Metlicka, Magdalena and Davendra, Donald and Herrmann, Frank and Meier, Markus and Amann, Matthias}, title = {GPU accelerated NEH algorithm}, series = {Proceedings of the 2014 IEEE Symposium on Computational Intelligence in Production and Logistics Systems (CIPLS), Orlando, FL, 09.-12. Dec. 2014}, booktitle = {Proceedings of the 2014 IEEE Symposium on Computational Intelligence in Production and Logistics Systems (CIPLS), Orlando, FL, 09.-12. Dec. 2014}, doi = {10.1109/CIPLS.2014.7007169}, pages = {114 -- 119}, abstract = {This research aims to develop a CUDA accelerated NEH algorithm for the permutative flowshop scheduling problem with makespan criterion. NEH has been shown in the literature as the best constructive heuristic for this particular problem. The CUDA based NEH aims to speed up the processing time by utilising the GPU cores for parallel evaluation. In order to show the versatility and scalability of the CUDA based NEH, four new higher dimensional Taillard sets are generated. The experiments are conducted on the CPU and GPU and pairwise compared. Percentage relative difference and paired t-test both confirm that the GPU based NEH significantly improves on the execution time compared to the sequential CPU version for all the high dimensional problem instances.}, subject = {Flow-shop-Problem}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Perturbation in Local Search for Scheduling}, series = {Proceedings of the 29th EUROPEAN Conference on Modeling and Simulation, May 26th - 29th, 2015, Albena, Bulgaria}, booktitle = {Proceedings of the 29th EUROPEAN Conference on Modeling and Simulation, May 26th - 29th, 2015, Albena, Bulgaria}, doi = {10.7148/2015-0446}, pages = {7}, abstract = {Local search is an established meta heuristic for scheduling problems. To avoid of getting stucked in a local optimum, the achieved solution is destroyed. Usually, this is done randomly. Here, two problem specific procedures are suggested. One focuses on jobs with the highest difference between the actual processing time and the net processing time of the job and the other one tries to remove jobs which causes the highest idle time for themselves or other jobs. Comprehensive simulations of test scheduling problems as well as a real world application show that both problem specific procedures outperform a random procedure.}, subject = {Ablaufplanung}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Simulation of a stochastic model for master production scheduling in a hierarchical production planning system used in industrial practise to cope with demand uncertainty}, series = {Proceedings of the 26th EURO Conference on Operations Research, July 1 - 4, 2013, Rome, Italy}, booktitle = {Proceedings of the 26th EURO Conference on Operations Research, July 1 - 4, 2013, Rome, Italy}, abstract = {Demand uncertainty for master production scheduling is addressed over the last years by approaches of stochastic or robust optimisation. In this contribution a more detailed model is regarded. Instead of analysing the planning results by a cost function, and so implicitly assume that the plans are realizable, here the effects of robust master production scheduling are evaluated using a planning hierarchy that is common in industrial applications. The primary objective is to minimise tardiness of customer order deliveries, and the secondary objective is to minimise inventory of end products.}, language = {en} } @inproceedings{EnglbergerHerrmann, author = {Englberger, Julian and Herrmann, Frank}, title = {Estimating Capacity Load Factors in Master Production Scheduling by the use of Stochastic Optimization}, series = {Tagungsband zu der Tagung Logistikmanagement 2013, 10. - 13. Oktober 2013, Bremen, Deutschland}, booktitle = {Tagungsband zu der Tagung Logistikmanagement 2013, 10. - 13. Oktober 2013, Bremen, Deutschland}, subject = {Produktionsplanung}, language = {en} } @inproceedings{DavendraHerrmannBialicDavendra, author = {Davendra, Donald and Herrmann, Frank and Bialic-Davendra, Magdalena}, title = {Scheduling tardiness constrained flow shop with simultaneously loaded stations using Genetic Algorithm}, series = {Proceedings of the 4th International Conference on Intelligent Systems, Metaheuristics \& Swarm Intelligence (ISMSI 2020): Thimphu, Kingdom of Bhutan during March 21-22, 2020}, booktitle = {Proceedings of the 4th International Conference on Intelligent Systems, Metaheuristics \& Swarm Intelligence (ISMSI 2020): Thimphu, Kingdom of Bhutan during March 21-22, 2020}, publisher = {ACM}, doi = {10.1145/3396474.3396475}, abstract = {In this study, a real world flow shop with a transportation restriction is regarded. This restriction reduces the set of feasible schedules even more than the no-buffer restrictions discussed in the literature in the case of limited storage. Still this problem is NP-hard. Since this scheduling problem is integrated in the usual hierarchical planning, the tardiness is minimised. Compared to even specific priority rule for this class of problems the suggested genetic algorithm delivers significant better results. The specific structure of this class of problems complicates the calculation of the performance criteria. This is solved by a simulation algorithm.}, subject = {Ablaufplanung}, language = {en} } @inproceedings{TrostClausTeichetal., author = {Trost, Marco and Claus, Thorsten and Teich, Enrico and Herrmann, Frank}, title = {Die soziale Dimension in der nachhaltigen hierarchischen Produktionsplanung - Stand der Forschung und Ans{\"a}tze zur Weiterentwicklung bestehender Planungsmodelle}, series = {Proceedings zur NAMA 2016 (NAMA 2016), October 5th - 7th, 2016, Dresden, Germany}, booktitle = {Proceedings zur NAMA 2016 (NAMA 2016), October 5th - 7th, 2016, Dresden, Germany}, pages = {4 S.}, abstract = {Bei der Produktionsplanung steht die Optimierung des Produktionssystems eines Unternehmens im Vordergrund. In diesem Beitrag wird auf Basis der hierarchischen Produktionsplanung aufgezeigt, dass neben {\"o}konomischen und {\"o}kologischen Aspekten insbesondere auch soziale Effekte bei der Entscheidungsfindung zu ber{\"u}cksichtigen sind. Dazu werden f{\"u}r die Hauptproduktionsprogrammplanung, die Losgr{\"o}ßenplanung und die Ressourcenbelegungsplanung dargelegt, welche sozialen Gr{\"o}ßen ber{\"u}cksichtigt werden k{\"o}nnen beziehungsweise bereits ber{\"u}cksichtigt sind. {\"U}berdies wird ein Modellansatz zur Hauptproduktionsprogrammplanung vorgestellt, der auf die Beseitigung identifizierter Forschungsl{\"u}cken abzielt.}, subject = {Hierarchische Produktionsplanung}, language = {de} } @inproceedings{FuchsHerrmannManitz, author = {Fuchs, Michael and Herrmann, Frank and Manitz, Michael}, title = {A Lagrangian relaxation based approach for the capacitated multi-level lot sizing problem with stochastic demands}, series = {SMMSO 2019 - 12th Conference on Stochastic Models of Manufacturing and Service Operations, June 9th - 14th, 2019, Goslar, Germany}, booktitle = {SMMSO 2019 - 12th Conference on Stochastic Models of Manufacturing and Service Operations, June 9th - 14th, 2019, Goslar, Germany}, subject = {Kapazit{\"a}tsbelegungsplanung}, language = {en} } @inproceedings{ManitzHerrmannMunninger, author = {Manitz, Michael and Herrmann, Frank and Munninger, Maximilian}, title = {Considering sequence-dependent stochasticity in production schedules}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2017 (OR 2017), Berlin, September 6 - 8, 2017}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2017 (OR 2017), Berlin, September 6 - 8, 2017}, subject = {Produktionsplanung}, language = {en} } @inproceedings{TerbrackHerrmannClaus, author = {Terbrack, Hajo and Herrmann, Frank and Claus, Thorsten}, title = {Determining an optimal energy demand range within master production scheduling}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2019 (OR 2019) Dresden, September 3 - 6, 2019}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2019 (OR 2019) Dresden, September 3 - 6, 2019}, subject = {Produktionsplanung}, language = {en} } @article{HerrmannReiter, author = {Herrmann, Frank and Reiter, Christian}, title = {Losbildung bei einem Engpass an Lagerfl{\"a}che im Presswerk eines Automobilzulieferers}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, volume = {10}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {10}, publisher = {AKWI}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2019.3238}, pages = {54 -- 71}, abstract = {Die im Presswerk eines Automobilzulieferers ben{\"o}tigte Lagerfl{\"a}che stieg in den letzten Jahren so gewaltig an, dass die bisher verwendeten Produktionslose manuell reduziert werden mussten, um {\"u}berhaupt einlagern zu k{\"o}nnen. Die dadurch sich ergebenden h{\"o}heren Kosten werden quantifiziert. Zur Verbesserung werden die strukturellen Unterschiede zwischen den neuen Losen und den durch ein Standardverfahren in ERP-Systemen gelieferten Losen analysiert. Diese Unterschiede zeigen, dass die 2. Stufe in diesem 2-stufigen Vorgehen - 1. Los berechnen und dann 2. dieses geeignet reduzieren - die Entscheidungen der ersten Stufe in der Regel vollst{\"a}ndig revidiert. Ein integrativer Ansatz ist erforderlich. Dies erfolgt durch ein lineares Optimierungsmodell mit beschr{\"a}nkter Lager fl{\"a}che. Das ILOG - Tool, ein Standardwerkzeug zur L{\"o}sung linearer Optimierungsmodelle, l{\"o}st dieses Modell innerhalb von Minuten. Dass mit diesem optimalen Verfahren die Kosten substantiell verringert werden, wird simulativ nachgewiesen. Seit einigen Monaten wird dieses Verfahren im Rahmen einer rollenden Planung im Presswerk eingesetzt. Eine rollende Planung bewirkt in der Regel einen Verlust in der L{\"o}sungsg{\"u}te. In diesem Fall wurden nahezu optimale L{\"o}sungen erreicht, mit denen die Kosten substantiell verringert wurden. Die Werksleitung und die Mitarbeiter sind mit diesem neuen Verfahren sehr zufrieden.}, language = {de} } @inproceedings{TrostClausHerrmann, author = {Trost, Marco and Claus, Thorsten and Herrmann, Frank}, title = {Master production scheduling with consideration of social aspects for networking with human resources requirements planning}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2018 (OR 2018), Br{\"u}ssel, September 12 - 14, 2018}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2018 (OR 2018), Br{\"u}ssel, September 12 - 14, 2018}, abstract = {A large number of current research focuses on the sustainable orientation of business processes. However, it is often neglected that, next to the ecological and economic dimension, the social dimension is also an important pillar of sustainability. Therefore, the intended contribution focuses on the integration of social aspects into the Master Production Scheduling and thus achieves a network between production planning and human resources requirements planning. The study shows that previous papers on production planning and control usually ignore the social dimension. Exceptions are works that take advantage of learning and forgetting effects at the lot-sizing and scheduling. In addition, there are various papers in the scheduling area which aim to reduce employee workload by optimizing resource allocation. Thus, however, only an optimal distribution of burden is achieved. Therefore, this paper presents a long-term management of the burden. To this end, the classic Master Production Scheduling, which has been statically limited in terms of capacity, whereby additional capacities have been used, will be expanded. At the same time, human resources requirements planning is based on assumptions regarding the expected capacity requirements. The created linear optimization model, addresses these weak points. A flexible available capacity is integrated on the basis of existing sales orders. It is making possible, to build up and reduce capacities, whereby technical restrictions (number of workplaces) and labor market conditions (number of available employees, qualification of employees and experience of employees) are also mapped. This represents a significant progress compared to previous models, whereby the target function minimizes costs. Further progress has been made in investigating the effects of exhaustion. The ratio of capacity requirements to available capacity was controlled externally as employee utilization and processing times dependent on the employee's utilization were taken into account. Subsequently, different utilization situations were examined under the assumption of different exhaustion and random demand patterns with the aim of determining an optimal employee utilization. A key finding of this study is that - contrary to common assumptions - achieving cost benefits is not necessarily associated with maximizing utilization, but rather with controlling employee utilization. An additional effect results from the reduction of the employee burden. However, the flexible capacity available does not limit the performance of the production system. In addition, we are currently working on the investigation of effects in a long-term planning horizon and of consequences for the downstream planning levels of production planning and control. Overall, the contribution presents an innovative research project that aims to integrate social aspects into production planning in order to make a contribution to truly sustainable models in the future.}, subject = {Produktionsplanung}, language = {en} } @inproceedings{TrostClausHerrmann, author = {Trost, Marco and Claus, Thorsten and Herrmann, Frank}, title = {Adapted Master Production Scheduling: Analysis on the impact of relevant social performance indicators from the GRI standard}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2019 (OR 2019) Dresden, September 3 - 6, 2019}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2019 (OR 2019) Dresden, September 3 - 6, 2019}, abstract = {The sustainable development of processes is currently an important topic in industry and science. Various interest groups and other factors like resource shortages or a lack of skilled workers drive this trend. In the area of Production and Operation Management, the integration of sustainable aspects is also becoming more and more important. However, mainly ecological aspects are considered. Thus, this contribution expands the previous research by the integration of social aspects. For this, we limit our research to the Master Production Scheduling as part of operational production planning. In the context of sustainability, the Global Reporting Initiative (GRI) Standard has established itself for companies and other organisations to report on their sustainability activities. It is the first and most widely adopted global standards for sustainability reporting. The aim of this standard is to measure the sustainable performance and in this way, sustainability activities can be oriented to specific performance indicators. Accordingly, the GRI standard enables concrete initiatives to improve social, environmental and economic conditions for everyone. The modular standard comprises 36 standard modules. For this paper, the 19 social modules were analysed and relevant indicators that could be influenced by the Master Production Scheduling were identified. One of the important indicators from the GRI standard for our research question is the use of employees, measured in terms of hiring and employee turnover. The long-term employee commitment and thus low fluctuation will become a competitive advantage in the future, which is enhanced by the demographic change and the lack of skilled workers. In order to integrate these aspects based on the GRI standard, the classic formulation of Master Production Scheduling is extended. For this a control of the employee utilization within concrete utilization intervals as well as dependent processing times due to different exhaustion effects were integrated. Additionally, in order to take into account the requirements of a flexible production and to model the use of employees, aspects of personnel requirements planning are considered as well, which enable the build-up and reduction of capacity. As a result, social and economic consequences of related production scenarios are presented. In this context, a conflict of targets arises especially with macroeconomic fluctuations. On the one hand, shortages and inventories should be avoided from an economic point of view. On the other hand, a low and constant work intensity as well as a constant number of staff should be preferred for long-term employee commitment. Accordingly, the ability of the model to examine these questions, which will become more and more important for industrial enterprises in the future, becomes clear. Furthermore, it can be seen that it is possible to improve social aspects by adapted production planning without neglecting economic targets.}, subject = {Produktionsplanung}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Scheduling in case of a Partially Automated Production}, series = {Proceedings of the International Annual Conference of the German Operations Research Society 2016 (OR 2016), Hamburg, 30.8. - 4.9.2016}, booktitle = {Proceedings of the International Annual Conference of the German Operations Research Society 2016 (OR 2016), Hamburg, 30.8. - 4.9.2016}, abstract = {In recent years, a considerable amount of interest has arisen for scheduling problems with technological restrictions. For example, no-buffer flow-shop scheduling problem are well investigated. Here a real world flow shop with a transportation restriction is regarded. It has to produce small batches, very often with a lot size of one, with short response times. Thus, scheduling algorithms are needed to ensure that under the constraint of a high average load of the flow shop, the duedates of the production orders are met. This transportation restriction reduces the set of feasible schedules even more than the nobuffer restrictions discussed in the literature in the case of limited storage. Still this problem is NP-hard. Due to the transportation restriction, the duration of a job A on the flow-shop depends on the other jobs processedon the flow-shop in the same time frame which is called a cycle. Realistic processing times are achieved by a simulation of the scheduling of A which includes the next jobs until A has left the flow-shop. The usage of such realistic processing times instead of net processing times improves the priority rules by around 16\%. There are pools of jobs where a large variance of the cycle times is beneficial and pools of jobs where a small variance is better. This is partially detected by agenetic algorithm. This improves the performance by another 34\%.}, subject = {Produktionsplanung}, language = {en} } @article{HerrmannBuettner, author = {Herrmann, Frank and B{\"u}ttner, Simon}, title = {Automatische Qualit{\"a}tskontrolle mittels Maschinellem Lernen und SAP Leonardo}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {10}, publisher = {AKWI}, issn = {2296-4592}, pages = {46 -- 53}, abstract = {In vielen Unternehmen werden von Menschen durch Ansehen von Produkten Produktionsfehler identifiziert. Die {\"u}bersehenen Produktionsfehler f{\"u}hren zunehmend h{\"a}ufiger zu teuren Kundenreklamationen. F{\"u}r die Produktion von Fußb{\"a}llen wird in dieser Arbeit diese manuelle Qualit{\"a}tssicherung analysiert. Als Alternative werden die Fußb{\"a}lle durch einen Roboter fotografiert u nd durch maschinelles Lernen werden Produktionsfehler auf diesen digitalen Fotos identifiziert. Dieser Pr{\"u}fprozess wird in SAP Leonardo implementiert und damit wird der bereits in einem SAP System implementierte Produktionsprozess (bzw. Unternehmensprozess) erweitert, wodurch ein durchg{\"a}ngig digitalisierter Gesamtprozess implementiert wird. Dadurch werden signifikant bessere Pr{\"u}fergebnisse erreichtb und die Durchlaufzeit des Pr{\"u}fprozesses wird substantiell reduziert.}, language = {de} } @incollection{Herrmann, author = {Herrmann, Frank}, title = {Grundlagen der Optimierung}, series = {Produktionsplanung und -steuerung}, booktitle = {Produktionsplanung und -steuerung}, editor = {Claus, Thorsten and Herrmann, Frank and Manitz, Michael}, publisher = {Springer Gabler}, address = {Berlin, Heidelberg}, isbn = {978-3-662-64290-0}, doi = {10.1007/978-3-658-25168-0_4}, pages = {61 -- 87}, abstract = {Seit vielen Jahrzehnten und in den letzten mit zunehmender Intensit{\"a}t werden Probleme als Optimierungsprobleme dargestellt. Beispiele sind die optimale Nutzungsdauer eines Investitionsobjekts, die Produktionsplanung, die Lagerhaltung bei zuf{\"a}lliger Nachfrage, die Beladung von Lastwagen und die Festlegung von deren (Fahr-) Routen. Dies f{\"u}hrte vor allem in amerikanische Literatur zur {\"o}konomischen Ausbildung zur Verwendung von Optimierungsmodelle zur Erl{\"a}uterung von Sachverhalten - als Beispiel m{\"o}ge das Buch Hillier und Hillier (2011) dienen, welches auch viele Fallstudien aus konkreten industriellen Anwendungen enth{\"a}lt.}, language = {de} } @inproceedings{TrostClausHerrmann, author = {Trost, Marco and Claus, Thorsten and Herrmann, Frank}, title = {Limitation of Temporary Employment in the Master Production Scheduling}, series = {Liberec Economic Forum 2021: Proceedings of the 15th International Conference}, booktitle = {Liberec Economic Forum 2021: Proceedings of the 15th International Conference}, editor = {Antlov{\´a}, Klara and Semer{\´a}dov{\´a}, Tereza}, edition = {1. Aufl.}, address = {Liberec, Czech Republic}, isbn = {978-80-7494-578-6}, pages = {201 -- 209}, language = {en} } @article{Herrmann, author = {Herrmann, Frank}, title = {Human Experience Versus Rule Decision at Krones AG}, series = {Biomedical Journal of Scientific \& Technical Research}, volume = {42}, journal = {Biomedical Journal of Scientific \& Technical Research}, number = {1}, publisher = {Biomedical Research Network+}, issn = {2574 -1241}, doi = {10.26717/BJSTR.2022.42.006691}, pages = {33255 -- 33260}, abstract = {Final assembly at Krones AG must make the best possible use of its production space and meeting the specified customer due dates is critical. Via a self developed simulation tool, the present scheduling procedure is compared with the one by priority rule shortest slack. As a consequence slack should have a higher importance in the planning}, language = {en} } @inproceedings{TerbrackClausGoetzetal., author = {Terbrack, Hajo and Claus, Thorsten and G{\"o}tz, Matthias and Herrmann, Frank and Selmair, Maximilian}, title = {Analyse von konventionellen Priorit{\"a}tsregeln zur Reduktion von CO2-Emissionen durch den Einsatz von Photovoltaikanlagen}, series = {Simulation in Produktion und Logistik 2021: Erlangen, 15.-17. September 2021}, booktitle = {Simulation in Produktion und Logistik 2021: Erlangen, 15.-17. September 2021}, editor = {Franke, J{\"o}rg and Schuderer, Peter}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3736974791}, pages = {75 -- 84}, language = {de} } @article{Herrmann, author = {Herrmann, Frank}, title = {Die Smart Factory und ihre Risiken}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {12}, publisher = {AKWI}, pages = {70 -- 83}, abstract = {In dieser Arbeit werden die Risiken einer Smart Factory untersucht und strukturiert dargestellt, um den Status der Smart Factory zu sondieren. Somit dient die Arbeit als {\"U}berblick {\"u}ber die technischen Komponen-ten einer Smart Factory und die damit verbundenen Risiken und nimmt eine ganzheitliche Sichtweise der Smart Factory ein. Die Ergebnisse zeigen, dass der gr{\"o}ßte Handlungsbedarf im technologischen Bereich liegt. Folglich wurden die Themen Standardisierung, Informationssicherheit, Verf{\"u}gbarkeit der IT-Infrastruktur, Verf{\"u}gbarkeit von schnellem Internet und komplexen Systemen priorisiert. Die organisato-rischen und finanziellen Risiken, welche ebenfalls eine wichtige Rolle bei einer Smart Factory Transfor-mation spielen, werden dabei adressiert.}, language = {de} } @incollection{Herrmann, author = {Herrmann, Frank}, title = {Generic Scheduling by an optimization model demonstrated for a partly automated production line}, series = {Recent Advances in Science and Technology Research Vol. 7}, booktitle = {Recent Advances in Science and Technology Research Vol. 7}, editor = {Makul, Natt}, publisher = {Book Publisher International (a part of SCIENCEDOMAIN International)}, isbn = {978-93-90431-52-6}, pages = {13 -- 27}, language = {en} } @article{HerrmannHorkovicsKovatsSultanow, author = {Herrmann, Frank and Horkovics-Kovats, Robert and Sultanow, Eldar}, title = {Ein paralleler Algorithmus f{\"u}r API Mining von C\# Code}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, volume = {16}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, publisher = {Technische Hochschule Wildau}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2022.3454}, pages = {48 -- 56}, abstract = {Die Konformit{\"a}tsanalyse ist eine Technik der statischen Code-Analyse (SCA) zur Software-Qualit{\"a}tssicherung. Ihr Kernproblem ist, dass Werkzeuge nicht aus bereits eingetretenen Fehlern automatisiert dazulernen. Zur L{\"o}sung wurde in dieser Arbeit das maschinelle Lernen (ML) evaluiert, indem ein wissenschaftlich fundierter und praktisch erprobter Ansatz zur un{\"u}berwachten Lerntechnik angewandt und das Ergebnis analysiert wurde. Es wurde festgestellt, dass zur Anwendung auf verschiedene Programmiersprachen nur ein sprachspezifisches API Mining-Tool notwendig ist. Ein derartiges Tool durchsucht in parallelisierter Form Codezeilen und normalisiert sie f{\"u}r maschinelle Lernprozesse. Dieses System wurde f{\"u}r die Programmiersprache C\# implementiert, da viele Industrieprojekte in dieser Sprache entwickelt werden. Zur funktionalen Validierung wurde in einer Fallstudie gezeigt, dass Regeln mit einem positiven Effekt auf Software-Qualit{\"a}t gelernt wurden. Konkret wurde der Wartungsaufwand eines Code-Smells in einem Beispielprojekt durch das Auslagern einer gelernten Assoziation in eine gemeinsame Methode um den Faktor 30 reduziert. Die Laufzeit des Algorithmus wurde empirisch in acht open-source Repositorys evaluiert. Durch Parallelisierung kann eine durchschnittliche Laufzeitverbesserung von 45,16\% erwartet werden. Allerdings wurden bei der Anwendung auch Grenzen deutlich: Viele Assoziationen sind nutzlos, die Regelbewertung ist von einem subjektiven Faktor abh{\"a}ngig und die Wirtschaftlichkeit des Tools ist deshalb nicht transparent. Dennoch belegt diese Arbeit, dass ein ML-basiertes SCA-Tool als erg{\"a}nzende Qualit{\"a}tssicherungsmaßnahme im Software-Engineering m{\"o}glich ist.}, language = {de} } @article{Herrmann, author = {Herrmann, Frank}, title = {Der Einsatz von ITK zur Abfallreduktion im Lebensmitteleinzelhandel}, series = {Russian Journal of Applied Sciences}, journal = {Russian Journal of Applied Sciences}, pages = {100 -- 104}, abstract = {Die Abfallproblematik in Nahrungsketten ist ein weltweit wichtiges Thema, wor{\"u}ber in vielen Medien h{\"a}ufig berichtet wird. Dieser Beitrag diskutiert die Verwendung der Informations- und Kommunikationstechnologien zum L{\"o}sen der Abfallproblematik im Lebensmitteleinzelhandel. Zuerst pr{\"a}sentieren wir existierende methodische L{\"o}sungsans{\"a}tze zur Abfallreduktion im Lebensmitteleinzelhandel. Anschließend zeigen wir, dass die Informations- und Kommunikationstechnologien sowohl bei diesen L{\"o}sungsans{\"a}tzen als auch bei vielen anderen methodisch {\"a}hnlichen Problemstellungen eine wichtige Rolle spielen.}, language = {de} } @inproceedings{ForstnerClausHerrmann, author = {Forstner, Robert and Claus, Thorsten and Herrmann, Frank}, title = {Anwendung eines Energieabnahmekorridors auf der Ebene der Hauptproduktionsprogrammplanung}, series = {Russian Journal of Applied Sciences}, booktitle = {Russian Journal of Applied Sciences}, publisher = {A. A. Kuleshov MSU}, address = {Mogilev}, pages = {95 -- 98}, language = {de} } @article{TrostHerrmann, author = {Trost, Marco and Herrmann, Frank}, title = {Necessity and application advantages of linked master production scheduling and human resources requirements planning}, series = {Problems of sustainable development of the regions of the Republic of Belarus and neighbouring countries : proceedings of the VII International Scientific-Practical Conference (Internet-conference), Mogilev, 1 May - 1 August 2018.}, journal = {Problems of sustainable development of the regions of the Republic of Belarus and neighbouring countries : proceedings of the VII International Scientific-Practical Conference (Internet-conference), Mogilev, 1 May - 1 August 2018.}, publisher = {A. A. Kuleshov Moskauer Staatliche Universit{\"a}t}, address = {Mogilev}, pages = {108 -- 113}, abstract = {The following article considers the need to integrate social aspects into the Master Production Scheduling. This is justified by the demand for sustainable business processes and the previously neglected social dimension, which is also reflected in the development of working conditions. The linear optimization model for Master Production Scheduling outlined in connection with aspects of Human Resource Requirements Planning offers an approach to reduce this research gap and underlines the urgency of long-term planning and control of employee burdens. For companies, this results in a Decision Support System through the evaluation of measures to improve working conditions.}, language = {en} } @article{Herrmann, author = {Herrmann, Frank}, title = {Principles of Business Forecasting}, series = {Interfaces}, volume = {44}, journal = {Interfaces}, number = {2}, publisher = {Institute for Operations Research}, doi = {10.1287/inte.2014.0734}, pages = {244 -- 245}, abstract = {In Book Reviews, we review an extensive and diverse range of books. They cover theory and applications in operations research, statistics, management science, econometrics, mathematics, computers, and information systems. In addition, we include books in other fields that emphasize technical applications. The editor will be pleased to receive an e-mail from those willing to review a book, with an indication of specific areas of interest. If you are aware of a specific book that you would like to review, or that you think should be reviewed, please contact the editor.}, language = {en} } @inproceedings{HerrmannSavasci, author = {Herrmann, Frank and Savasci, Faruk}, title = {Simulation der Einplanung der terminkritischen Montage von Abf{\"u}llanlagen am Beispiel der Krones AG}, series = {Simulation in Produktion und Logistik 2021: Erlangen, 15.-17.September 2021}, booktitle = {Simulation in Produktion und Logistik 2021: Erlangen, 15.-17.September 2021}, editor = {Franke, J{\"o}rg and Schuderer, Peter}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3736974791}, pages = {653 -- 662}, abstract = {Many companies need to make the best possible use of their production areas. For others, meeting predetermined customer due dates is critical. Few companies have to meet both requirements simultaneously. One example is the final assembly at Krones AG. An extensive simulation study identified potential for improvement. In some planning problems, preferring orders due to buffer time proves to be advantageous. In others, avoiding unused space is better. This project is to be continued with the development of a simulation-based planning program.}, language = {de} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Simulative Comparison of Scheduling at Krones AG with Shortest Slack}, series = {SIMUL 2021: the Thirteenth International Conference on Advances in System Simulation, October 3-7, 2021, Barcelona, Spain}, booktitle = {SIMUL 2021: the Thirteenth International Conference on Advances in System Simulation, October 3-7, 2021, Barcelona, Spain}, editor = {Herrmann, Frank and Popescu, Manuela and Audette, Michel A.}, publisher = {IARIA}, address = {Wilmington, DE, USA}, isbn = {978-1-61208-898-3}, pages = {20 -- 24}, abstract = {Final assembly at Krones AG must make the best possible use of its production space, and meeting the specified customer due dates is critical. Via a self developed simulation tool, the present scheduling procedure is compared with the one by priority rule shortest slack. As a consequence slack should have a higher importance in the planning.}, language = {en} } @article{TerbrackClausHerrmann, author = {Terbrack, Hajo and Claus, Thorsten and Herrmann, Frank}, title = {Energy-Oriented Production Planning in Industry}, series = {Sustainability}, volume = {13}, journal = {Sustainability}, number = {23}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/su132313317}, pages = {1 -- 32}, abstract = {Scarcity of resources, structural change during the further development of renewable energy sources, and their corresponding costs, such as increasing resource costs or penalties due to dirty production, lead industrial firms to adapt ecological actions. In this regard, research on energy utilization in production planning has received increased attention in the last years, resulting in a large number of research articles so far. With the paper at hand, we review the literature on energy-oriented production planning. The aim of this study is to derive similar core issues and related properties along energy-oriented models within hierarchical production planning. For this, we carry out a systematic literature review and analyze and synthesize 375 research articles. We classify the underlying literature with a novel two-dimensional classification scheme and identify three key topics and five frequently found characteristics, which are presented in detail throughout this article. Based on these results, we state several potentials for further research.}, language = {en} } @article{MalovanijHerrmann, author = {Malovanij, Julian and Herrmann, Frank}, title = {Implementierung eines Treibers zur Anbindung von Mikrocontroller-basierten Maschinen {\"u}ber OPC-UA an das Konfigurations- und Inbetriebnahme-Tool von SSI Sch{\"a}fer}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {20}, publisher = {AKWI}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2024.6210}, pages = {54 -- 66}, abstract = {Das Thema „Implementierung eines Treibers zur Anbindung von Mikrocontroller-basierten Maschinen {\"u}ber OPC-UA an das Konfigurations- und Inbetriebnahme-Tool von SSI Sch{\"a}fer" soll zu einem Ger{\"a}tetreiber f{\"u}r das Konfigurations- und Inbetriebnahme-Tool CPM f{\"u}hren, welcher den Anschluss von neuen Maschinen an ebendieses erm{\"o}glicht. Aktuell befinden sich diese noch in Entwicklung, jedoch sollen sie, von den Vorteilen des CPM-Tools profitieren, welches unter anderem den Inbetriebnahmeprozess einfacher und schneller gestalten kann. Ziel ist somit die Anbindung dieser Maschinen durch die Spezifikation einer Schnittstelle und der Implementierung dieser auf Basis der Schnittstellen des CPM-Tools, in welches sich der Ger{\"a}tetreiber nahtlos einf{\"u}gen soll.}, language = {de} } @incollection{HerrmannManitz, author = {Herrmann, Frank and Manitz, Michael}, title = {Ein hierarchisches Planungskonzept zur operativen Produktionsplanung und -steuerung}, series = {Produktionsplanung und -steuerung}, booktitle = {Produktionsplanung und -steuerung}, editor = {Claus, Thorsten and Herrmann, Frank and Manitz, Michael}, publisher = {Springer Gabler}, address = {Berlin, Heidelberg}, isbn = {978-3-662-64290-0}, doi = {10.1007/978-3-662-64291-7_2}, pages = {9 -- 25}, abstract = {Ausgangspunkt f{\"u}r die operative Produktionsplanung und -steuerung ist eine Infrastruktur aus Produktionsressourcen mit definierten Produktionskapazit{\"a}ten, auf denen jeweils die Produktion eines oder mehrerer verschiedener Produkte erfolgen kann.}, language = {de} } @incollection{HerrmannLange, author = {Herrmann, Frank and Lange, Frederick}, title = {Belastungsorientierte Ans{\"a}tze in der Produktionsplanung}, series = {Produktionsplanung und -steuerung}, booktitle = {Produktionsplanung und -steuerung}, editor = {Claus, Thorsten and Herrmann, Frank and Manitz, Michael}, publisher = {Springer Gabler}, address = {Berlin, Heidelberg}, isbn = {978-3-662-64290-0}, doi = {10.1007/978-3-662-64291-7_9}, pages = {159 -- 182}, abstract = {Unter Ber{\"u}cksichtigung aller Steuergr{\"o}ßen, Restriktionen und Bedingungen kann durch einen simultanen Planungsansatz ein optimaler Produktionsplan erstellt werden.}, language = {de} } @incollection{ClausHerrmannManitz, author = {Claus, Thorsten and Herrmann, Frank and Manitz, Michael}, title = {Knappe Kapazit{\"a}ten und Unsicherheit - Analytische Ans{\"a}tze und Simulation in der Produktionsplanung und -steuerung}, series = {Produktionsplanung und -steuerung}, booktitle = {Produktionsplanung und -steuerung}, editor = {Claus, Thorsten and Herrmann, Frank and Manitz, Michael}, publisher = {Springer Gabler}, address = {Berlin, Heidelberg}, isbn = {978-3-662-64290-0}, doi = {10.1007/978-3-662-64291-7_1}, pages = {3 -- 7}, language = {de} } @incollection{HerrmannEnglberger, author = {Herrmann, Frank and Englberger, Julian}, title = {Robuste Optimierung zur Produktionsprogrammplanung}, series = {Produktionsplanung und -steuerung}, booktitle = {Produktionsplanung und -steuerung}, editor = {Claus, Thorsten and Herrmann, Frank and Manitz, Michael}, publisher = {Springer Gabler}, address = {Berlin, Heidelberg}, isbn = {978-3-662-64290-0}, doi = {10.1007/978-3-662-64291-7_4}, pages = {39 -- 61}, language = {de} } @article{Herrmann, author = {Herrmann, Frank}, title = {Using Optimization Models for Scheduling in Enterprise Resource Planning Systems}, series = {Systems}, volume = {4}, journal = {Systems}, number = {1}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/systems4010015}, pages = {1 -- 15}, abstract = {Companies often use specially-designed production systems and change them from time to time. They produce small batches in order to satisfy specific demands with the least tardiness. This imposes high demands on high-performance scheduling algorithms which can be rapidly adapted to changes in the production system. As a solution, this paper proposes a generic approach: solutions were obtained using a widely-used commercially-available tool for solving linear optimization models, which is available in an Enterprise Resource Planning System (in the SAP system for example) or can be connected to it. In a real-world application of a flow shop with special restrictions this approach is successfully used on a standard personal computer. Thus, the main implication is that optimal scheduling with a commercially-available tool, incorporated in an Enterprise Resource Planning System, may be the best approach.}, language = {en} } @inproceedings{TrostTerbrackClausetal., author = {Trost, Marco and Terbrack, Hajo and Claus, Thorsten and Herrmann, Frank}, title = {Established production planning and control and its enhancement with sustainability}, series = {Proceedings of the 37th ECMS International Conference on Modeling and Simulation (ECMS 2023): June 20th - June 23rd, 2023, Florence, Italy}, booktitle = {Proceedings of the 37th ECMS International Conference on Modeling and Simulation (ECMS 2023): June 20th - June 23rd, 2023, Florence, Italy}, publisher = {ECMS}, isbn = {978-3-937436-80-7}, issn = {2522-2422}, doi = {10.7148/2023-0320}, pages = {320 -- 327}, abstract = {Against the background of the energy crisis, shortage of skilled workers, demographic change and other drivers, sustainable development is also becoming increasingly important for industrial companies. In this respect, production planning and control has an enormous influence on relevant objectives. In classical approaches of production planning and control as presented in this paper, economic-oriented objectives are taken into account to a large extent in decision making. This paper demonstrates that besides these classical models, a variety of approaches exist to influence ecological and social targets through production planning. These different models are assigned to sustainability areas and outlined by exemplary literature sources. Further research is needed, for instance, in the joint consideration of sustainability criteria along different planning levels and sustainable dimensions.}, language = {en} } @article{TrostClausHerrmann, author = {Trost, Marco and Claus, Thorsten and Herrmann, Frank}, title = {Social Sustainability in Production Planning: A Systematic Literature Review}, series = {Sustainability}, volume = {14}, journal = {Sustainability}, number = {13}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/su14138198}, pages = {1 -- 31}, abstract = {Sustainable production includes economic, environmental, and social aspects. However, social sustainability has received less attention, especially compared to the economic aspects. Next to technical and organizational measures, social improvements within supply chains can also be achieved through suitable production planning. Within production planning, production programs are determined, and the assignment of available resources (e.g., employees) is specified. Thus, the utilization and workload of employees are defined. This systematic literature review investigates to what extent such employee-related social aspects are reflected in production planning and discusses whether economic aspects dominate them. For this, a Scopus database search was carried out and 76 identified approaches were analyzed and categorized regarding the occurring employee-related social aspects and their implementation. Thus far, the approaches mainly consider single aspects on single planning levels. A consideration of a broad set of aspects along the entire production planning has rarely been studied. In particular, health and safety aspects are considered on the levels of assembly line balancing and job rotation. However, their impact is primarily determined by the specific settings of the decision-maker. To support decision-makers, only a few studies have investigated the effects based on real application scenarios. Further potential might be an extended modeling of social and economic interdependencies and a consideration of employee-related social aspects in medium- to long-term production planning.}, language = {en} } @book{Herrmann, author = {Herrmann, Frank}, title = {Lineare Optimierung unter Unsicherheit}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, isbn = {978-3-658-34580-8}, doi = {10.1007/978-3-658-34581-5}, abstract = {Modellierungsalternativen werden mathematisch exakt formuliert; St{\"a}rken und Schw{\"a}chen der derzeit eingesetzten Modellierungstechniken werden demonstriert; Leicht nachrechenbare Fallstudien}, language = {de} } @article{DavendraHerrmannBialicDavendra, author = {Davendra, Donald and Herrmann, Frank and Bialic-Davendra, Magdalena}, title = {Chaotic Flower Pollination Algorithm for scheduling tardiness-constrained flow shop with simultaneously loaded stations}, series = {Neural computing \& applications}, journal = {Neural computing \& applications}, publisher = {Springer Nature}, doi = {10.1007/s00521-022-08044-0}, abstract = {This paper introduces a novel chaotic flower pollination algorithm (CFPA) to solve a tardiness-constrained flow-shop scheduling problem with simultaneously loaded stations. This industrial manufacturing problem is modeled from a filter basket production line in Germany and has been generally solved using standard deterministic algorithms. This research develops a metaheuristic approach based on the highly efficient flower pollination algorithm coupled with different chaos maps for stochasticity. The objective function targeted is the tardiness constraint of the due dates. Fifteen different experiments with thirty scenarios are generated to mimic industrial conditions. The results are compared with the genetic algorithm and with the four standard benchmark priority rule-based deterministic algorithms of First In First Out, Raghu and Rajendran, Shortest Processing Time and Slack. From the obtained results and analysis of the relative difference, percentage relative difference and t tests, CFPA was found to be significantly better performing than the deterministic heuristics and the GA algorithm.}, language = {en} } @article{HerrmannEnglTrubjansky, author = {Herrmann, Frank and Engl, Fabian and Trubjansky, Philipp}, title = {Ein funktionaler Vergleich der SAP Analytics Cloud und Microsoft Power BI zur Verwendung im Bereich People Analytics bei Vitesco Technologies}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {15}, publisher = {Hochschule Luzern}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2022.3337}, pages = {8 -- 21}, abstract = {Aufgrund leistungsbedingter Einschr{\"a}nkungen durch die aktuelle Business-Intelligence-Software PowerBI vergleicht die People-Analytics-Abteilung von Vitesco Technologies diese mit der Alternativsoftware SAP Analytics Cloud. Daf{\"u}r wurden zun{\"a}chst aktuelle Herausforderungen im People-Analytics-Umfeld identifiziert und basierend darauf Vergleichskriterien erarbeitet. Als Vergleichsmodell kommt das Kano-Modell zum Einsatz. Die durchgef{\"u}hrte Evaluation favorisiert aus funktionaler Sicht einen Umstieg auf die SAP Analytics Cloud, identifiziert allerdings eine Reihe an Herausforderungen, die einen sofortigen Wechsel einschr{\"a}nken. Zu diesen geh{\"o}ren sowohl die Verf{\"u}gbarkeit als auch die Qualit{\"a}t der HR-Daten.}, language = {de} } @article{HerrmannRufDittert, author = {Herrmann, Frank and Ruf, Elena and Dittert, Oliver}, title = {Robotic Process Automation als Enabler der Digitalen Transformation der OSRAM Continental GmbH}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {15}, publisher = {Hochschule Luzern}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2022.3329}, pages = {44 -- 56}, abstract = {Der vorliegende Artikel befasst sich mit der Automa-tisierung von Unternehmensprozessen mit Hilfe von Robotic Process Automation (RPA). Um die zentrale Frage nach den Potentialen von RPA zu beantworten, wurde gemeinsam mit der OSRAM Continental GmbH eine Fallstudie in der Einkaufsabteilung durchgef{\"u}hrt. In dieser Fallstudie werden die F{\"a}higkeiten von Attended RPA sowie die Unterschiede im Vergleich zu einem bereits im Unternehmen beste-henden Workflow-Automation-Systems untersucht. Die Automatisierung hat gezeigt, dass mittels RPA das Automatisierungspotential eindeutig erweitert werden kann. Jedoch wurden ebenso deutlich, dass die Technologie auf bestimmte Aufgaben begrenzt ist und daher ein hybrider Automatisierungsansatz mit beiden Technologien die vielversprechendste L{\"o}sung darstellt.}, language = {de} } @article{EnglbergerHerrmannManitz, author = {Englberger, Julian and Herrmann, Frank and Manitz, Michael}, title = {Master production scheduling with scenario-based capacity-load factors in a rolling planning environment}, series = {Logistics Research, Special Issue "Supply Chain Analytics in the 2020s"}, volume = {15}, journal = {Logistics Research, Special Issue "Supply Chain Analytics in the 2020s"}, publisher = {Bundesvereinigung Logistik (BVL) e.V.}, address = {Bremen}, doi = {10.23773/2022_12}, pages = {1 -- 16}, abstract = {This paper proposes two stochastic programming models for master production scheduling with capacity-load factor scenarios. In contrast to other work on production planning with load-dependent lead times or dynamic capacity loads, we iteratively build a set of realistic capacity-load factor scenarios by simulating the realization of the master production schedules in a rolling horizon environment. Therefore, we integrate the models into a hierarchical production planning and control system that is common in industrial practice and measure the effective capacity-load factors. With these factors, we resolve the master production scheduling problem. Toa evaluate the performance of the proposed models, we compare the stochastic models with the common approach to reduce the nominally available capacity for master production scheduling. In our experiments, the stochastic models significantly reduce the tardiness of production orders caused by capacity bottlenecks.}, language = {en} } @inproceedings{TerbrackClausHerrmann, author = {Terbrack, Hajo and Claus, Thorsten and Herrmann, Frank}, title = {Addressing Energy Consumption and Energy-related Emissions by Single Machine Scheduling}, series = {Operations Research Proceedings 2022, Abstracts of the Annual International Conference of the German Operations Research Society (Gor): Karlsruhe, Germany, September 6-9, 2022}, booktitle = {Operations Research Proceedings 2022, Abstracts of the Annual International Conference of the German Operations Research Society (Gor): Karlsruhe, Germany, September 6-9, 2022}, editor = {Grothe, Oliver and Nickel, Stefan and Rebennack, Steffen and Stein, Oliver}, language = {en} } @inproceedings{TerbrackClausHerrmann, author = {Terbrack, Hajo and Claus, Thorsten and Herrmann, Frank}, title = {Emission reduction through production scheduling by priority rules and energy onsite generation}, series = {Proceedings of the 36th ECMS International Conference on Modelling and Simulation (ECMS 2022), May 30th - June 3rd, 2022, {\AA}lesund, Norway}, booktitle = {Proceedings of the 36th ECMS International Conference on Modelling and Simulation (ECMS 2022), May 30th - June 3rd, 2022, {\AA}lesund, Norway}, publisher = {ECMS}, isbn = {978-3-937436-77-7}, issn = {2522-2414}, doi = {10.7148/2022-0114}, pages = {114 -- 120}, abstract = {This article describes primary findings of various simulation runs on job shop scheduling dealing with energy consumption and emission pollution. By two combinations of priority rules, production is linked to the generation output of a renewable energy source installed onsite. The resulting schedules show a reduction of energy-related emissions and makespan compared to several conventional priority rules often used in industrial practice.}, language = {en} } @article{HerrmannRiedlJanoschek, author = {Herrmann, Frank and Riedl, Nadine and Janoschek, Stefan}, title = {Konzeptionierung und Implementierung einer standardisierten RPA-Schnittstelle f{\"u}r eine Analytics-On-Demand-Self-Service-L{\"o}sung zur Bereitstellung von einkaufsbezogenen Daten in der Krones AG}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {19}, publisher = {AKWI}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2024.5510}, pages = {51 -- 63}, abstract = {Hohe Bearbeitungs- und Antwortzeiten von Tickets, die diverse Aufgaben aus dem Bereich Analytics inkludieren, f{\"u}hrten Corporate Procurement (CP) Processes and Systems zur Konzeptionierung und Implementierung einer standardisierten RPA-Schnittstelle, um einen Analytics-On-Demand-Self-Service zur Bereitstellung von einkaufsbezogenen Daten zu realisieren. Daf{\"u}r wurde zun{\"a}chst ein Anforderungskatalog erarbeitet, der als Basis f{\"u}r die Konzeptionierung und Implementierung aller zur Pr{\"u}fung der Funktionsf{\"a}higkeit der RPA-Schnittstelle erforderlichen Komponenten diente. Als Proof-of-Concept fungieren die Analytics-Use-Cases der Orderbuchabfrage und Abfrage von Einkaufsinfos{\"a}tzen mit Konditionen. Die durchgef{\"u}hrte Evaluation bescheinigt aus technischer und prozessualer Sicht den Erfolg des Projekts, wobei im Vordergrund die zuk{\"u}nftig nach Einf{\"u}hrung des Analytics-On-Demand-Self Service gewonnen zeitlichen Kapazit{\"a}ten und verringerten Wartezeiten bei den Mitarbeitenden des Einkaufs der Krones AG stehen.}, language = {de} } @article{EnglHerrmann, author = {Engl, Fabian and Herrmann, Frank}, title = {A Machine Learning based Approach on Employee Attrition Prediction with an Emphasize on predicting Leaving Reasons}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {18}, publisher = {AKWI}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2023.4488}, pages = {30 -- 40}, abstract = {Using Vitesco Technologies as an example, this article examines whether machine learning models are suitable for detecting employee attrition at an early stage, with the aim of uncovering underlying reasons for leaving. Nine different machine learning algorithms were examined: K-nearest-neighbors, Naive Bayes, logistic regression, a support vector machine, a neural network, a random forest, adaptive boosting, and two gradient boosting models. A three-way-holdout validation method was implemented to assess the quality of the results and measure both the f-score and the degree of model generalization. Initially, it was found that tree-based methods are best suited for classifying employees. A multiclass classification approach showed that under certain conditions it is even possible to predict the underlying leaving reasons.}, language = {en} } @article{HerrmannKerschbaum, author = {Herrmann, Frank and Kerschbaum, Andreas}, title = {Auswahl und Anwendung einer geeigneten Software zur standardisierten und automatisierten Berichterstellung im Service am Beispiel der Maschinenfabrik Reinhausen GmbH}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {19}, publisher = {AKWI}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2024.5946}, pages = {39 -- 50}, abstract = {Die Berichterstattung ist ein wichtiger Bestandteil der Aufgaben der MR. Aktuell fehlen zur Erledigung dieser Aufgabe festgelegte Standards, sowie ein Programm, das sich umfangreich f{\"u}r diese Aufgabenstellung eignet. Im Rahmen der vorliegenden Arbeit wird die Prozessstrecke des Prozesses zur Erstellung eines {\"O}lberichts aufgenommen und auf Schwachstellen untersucht. Anschließend erfolgt die Verbesserung der Schwachstellen durch die Einf{\"u}hrung einer neuen Software. Dise wird in einem phasenbasierten Prozess,in Anlehnung an das Phasenmodell zur Softwareauswahl nach Gronau, unter Einbezug festgelegter Kriterien sorgf{\"a}ltig ausgew{\"a}hlt. Das Ergebnis dieser Arbeit ist die Verbesserung des betrachteten Prozesses, sowie die Einf{\"u}hrung der Software DevExpress und die Erstellung eines ersten Entwurfsberichts welcher als Vorlage f{\"u}r die zuk{\"u}nftigen Berichte dient.}, language = {de} } @article{HerrmannJankerLaubmeier, author = {Herrmann, Frank and Janker, Sebastian and Laubmeier, Franz}, title = {Integration eines Support-Ticketsystems in die Prozesse des Gesch{\"a}ftsbereichs Informatik + Systeme}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {20}, publisher = {AKWI}, issn = {2296-4592}, doi = {10.26034/lu.akwi.2024.6211}, pages = {67 -- 75}, abstract = {Eine effiziente Bearbeitung von Kundenanliegen und organisierte Hilfe zu einem digitalen Produkt sind f{\"u}r ein modernes Unternehmen wie die F.EE GmbH unabdingbar. Ein zentraler Bestandteil f{\"u}r ein Support-Team beim Bereitstellen dieser Dienstleistungen ist ein SupportTicketsystem mit Optionen zur Automatisierung von Arbeitsabl{\"a}ufen. Der Gesch{\"a}ftsbereich Informatik + Systeme des Unternehmens F.EE GmbH verwendet zurzeit ein Ticketsystem, das aufgrund eines endenden Supportzeitraums ersetzt werden muss. Ohne Supportunterst{\"u}tzung d{\"u}rften unter anderem Sicherheitsl{\"u}cken auftreten. Von den vielen am Markt verf{\"u}gbaren Systemen wurde das Open-Source-Ticketsystem ausgew{\"a}hlt. Zur effektiven Nutzung musste es signifikant erweitert werden.}, language = {de} } @book{Herrmann, author = {Herrmann, Frank}, title = {Produktionsplanung}, publisher = {Springer Gabler}, address = {Wiesbaden}, isbn = {978-3-658-40218-1}, doi = {10.1007/978-3-658-40218-1}, pages = {341}, abstract = {Eine operative Produktionsplanung und -steuerung ist zentral f{\"u}r eine effektive und effiziente Produktion in Unternehmen und daher eine wesentliche Komponente von Enterprise Ressource Planning Systemen zur Regelung von Unternehmensprozessen. Die implementierten Verfahren sind integraler Bestandteil von Veranstaltungen zur Produktion und Logistik, zu Produktionsplanungs- und -steuerungsystemen, zum Supply Chain Management usw. in Bachelor- und Masterstudieng{\"a}ngen an Hochschulen und Universit{\"a}ten. Die Aufgaben in diesem {\"U}bungsbuch erg{\"a}nzen die in diesen Veranstaltungen und auch in den entsprechenden Standardlehrb{\"u}chern erl{\"a}uterten Verfahren durch sehr detaillierte L{\"o}sungen - {\"u}ber die angegebene Literatur d{\"u}rften diese sich im Selbststudium erarbeiten lassen. Die Wiederholungsfragen vertiefen das Verst{\"a}ndnis {\"u}ber den Einsatz dieser Verfahren, insbesondere in der industriellen Praxis. Aufgrund ihres Umfangs und ihres Schwierigkeitsgrads sind die Aufgaben und Fragenals Klausuraufgaben geeignet. Folglich wendet sich das Buch an Studierende (und mit Einschr{\"a}nkungen an Doktoranden) mit ausgepr{\"a}gtem Interesse an der L{\"o}sung von Produktionsplanungsproblemen. Ferner wendet es sich an Wissenschaftler und Experten in Unternehmen, die einen Eindruck von l{\"o}sbaren Produktionsplanungsproblemen gewinnen wollen.}, language = {de} } @inproceedings{DaiSchoenClausetal., author = {Dai, Chenghao and Sch{\"o}n, Maximilian and Claus, Thorsten and Herrmann, Frank}, title = {Multi-Site Aggregate Production Planning With Resilience Consideration}, series = {Proceedings of the 38th ECMS International Conference on Modeling and Simulation (ECMS 2024): June 4th - June 7th, 2024, Cracow, Poland}, booktitle = {Proceedings of the 38th ECMS International Conference on Modeling and Simulation (ECMS 2024): June 4th - June 7th, 2024, Cracow, Poland}, publisher = {ECMS}, isbn = {978-3-937436-84-5}, issn = {2522-2422}, doi = {10.7148/2024-0345}, pages = {345 -- 351}, abstract = {The recent years have shown a high frequency of disruptions like natural disasters or manmade disruptions, leading, for example, to transport routes or production facilities being unavailable for extended periods. Many manufacturing companies, which nowadays operate in a global production network, are heavily exposed to these disruptions. This results in both significant costs and substantial exceeding of promised deadlines. If it concerns the first company in a supply chain, it causes correspondingly significant delays in promised deadlines for subsequent companies in the supply chain, including a correspondingly significant increase in costs. Both are exemplified in this paper through a case study. This case study demonstrates that through resilience, both implications can be significantly reduced.}, language = {en} } @article{TrostClausHerrmann, author = {Trost, Marco and Claus, Thorsten and Herrmann, Frank}, title = {Master Production Scheduling with Consideration of Utilization-Dependent Exhaustion and Capacity Load}, series = {Sustainability}, volume = {15}, journal = {Sustainability}, publisher = {MDPI}, doi = {10.3390/su15086816}, pages = {1}, abstract = {A large number of researchers have addressed social aspects in hierarchical production planning. This article responds to research gaps identified in our previous literature review. Accordingly, consideration of social aspects and the economic implications of social improvements are required in a longer term planning approach. For this, we integrate work intensity as employee utilization in a general mixed-integer programming model for master production scheduling. Following existing fatigue functions, we represent the relationship between work intensity and exhaustion through an employee-utilization-dependent exhaustion function. We account for the economic implications through exhaustion-dependent capacity load factors. We solve our model with a CPLEX standard solver and analyze a case study based on a realistic production system and numerical data. We demonstrate that the consideration of economic implications is necessary to evaluate social improvements. Otherwise, monetary disadvantages are overestimated, and social improvements are, thus, negatively affected. Moreover, from a certain level of work-intensity reduction, demand peaks are smoothed more by pre-production, which requires more core employees, while temporary employment is reduced. Further potential may arise from considering and quantifying other interdependencies, such as employee exhaustion and employee days off. In addition, the relationship between social working conditions and employee turnover can be integrated.}, language = {en} } @inproceedings{Herrmann, author = {Herrmann, Frank}, title = {Performance of Storage Strategies in a Highbay Warehouse}, series = {SIMUL 2022, the 14th International Conference on Advances in System Simulation: October 16-20, 2022, Lisbon, Portugal}, booktitle = {SIMUL 2022, the 14th International Conference on Advances in System Simulation: October 16-20, 2022, Lisbon, Portugal}, editor = {Herrmann, Frank}, publisher = {IARIA}, issn = {2308-4537}, pages = {69 -- 73}, abstract = {Storage and retrieval times of goods in inventory processes determine the efficiency of highbay warehouses in companies. These times are highly dependent on the performance of rack feeders. Storage strategies have the greatest influence. The paper shows the impact of an efficient control of rack feeders through storage strategies. Storage strategies which are typically used in industrial inventory processes are analysed. For the analysis a simulation system is implemented, so that the real process times are similar to the simulated ones. This results in recommendations for the use of storage strategies in companies.}, language = {en} }