@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} } @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{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} }