@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} }