scheduling

Concept of an Adaptive Simulations-based Optimization Method for the Scheduling and Control of Dynamic Manufacturing Systems

Concept of an Adaptive Simulations-based Optimization Method for the Scheduling and Control of Dynamic Manufacturing Systems

Konzept zur Planung und Steuerung dynamischer Produktionssysteme
Mirko Kück, Jens Ehm, Michael Freitag ORCID Icon, Enzo M. Frazzon
The increasing customization of products, which leads to higher numbers of product variants with smaller lot sizes, requires a high flexibility of manufacturing systems. These systems are subject to dynamic influences and need increasing effort for the generation of the production schedules and for the control of the processes. This paper presents an approach that addresses these challenges. First, scheduling is done by coupling an optimization heuristic with a simulation model to handle complex and stochastic manufacturing systems. Second, the simulation model is continuously adapted by real-time data from the shop floor. If, e.g., a machine goes down or a rush order appears, the simulation model and consequently the scheduling model is updated and the optimization heuristic adjusts an existing schedule or generates a new one. This approach uses real-time data provided by future cyber-physical systems to integrate scheduling and control and to manage the dynamics of highly flexible ...
Industrie 4.0 Management | Volume 32 | 2016 | Edition 5 | Pages 26-31
Optimal Synchronization of Automatic Storage System and Milk Run System

Optimal Synchronization of Automatic Storage System and Milk Run System

Optimales Zusammenspiel von Automatiklagern und Routenzügen
Stefan Galka, Eva Klenk, Willibald A. Günthner, Dieter Trautzsch, Claudia Vogel-Daniel
Modern lean production systems require fast, stable and efficient logistics processes to guarantee just-in-time deliveries of materials to production. For this, a new logistics concept for a plant of the Brose group was developed, which consists of an automatic small parts storage system and an in-plant milk run system. One major challenge was the synchronization of the storage system and the milk run systems in a way that both systems are operated with even utilization and that no obstructions occur between milk run trains. To this end, a timetable was implemented which determines departure times of each milk run train at the warehouse. The timetable takes into account breaks, shift changes and other relevant restrictions. The generation and monitoring of the schedules was implemented entirely in SAP EWM.
Industrie Management | Volume 31 | 2015 | Edition 2 | Pages 57-60
Synchronization in Transport Systems

Synchronization in Transport Systems

Fahrzeugübergreifende Ablaufplanung für die Erfüllung komplexer Serviceanforderungen im Straßengüterverkehr
Jörn Schönberger
We observe an ongoing increase of complexity of transport and transport-related services in road-based freight carriage as a result of increasing shipper demand. As a consequence, fleet management and fleet dispatching challenges become quite harder. A particular challenge comprises the synchronization of operations related to a complex order, in which the activities of two or more vehicles are coupled by temporal coordination constraints. This article outlines challenges and research questions related to fleet scheduling with comprehensive service requirements. We give an insight into first research results.
Industrie Management | Volume 31 | 2015 | Edition 2 | Pages 15-18