Future paths for integer programming and links to artificial intelligence
Computers and Operations Research - Special issue: Applications of integer programming
Lot sizes, lead times and inprocess inventories
Management Science
Simultaneous determination of lot sizes and routing mix in job shops
Management Science
Job shop scheduling by simulated annealing
Operations Research
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The current paper describes an order release and loading technique, which considers the routing as well as the machine flexibility of a modern job shop production. The workload control approach involves three steps. In the first step 'lead orders', i.e. urgent production orders that are either processed on a known bottleneck or are of high value, are identified. Afterwards transfer batches of the lead part types are calculated using the aspired machine time as a control parameter. This parameter defines an adequate processing time of a machining centre before it is set up for a new job. Finally, the bottom-line workload of the machining centres is determined by allocating and sequencing transfer batches. The procedure is tested by a simulation program that replicates the performance of the production facility of a machine manufacturer, consisting of a flexible manufacturing cell that is embedded into a job shop production for heavy parts.