EVALUATING ORDER RELEASE MECHANISMS IN A JOB SHOP WITH SEQUENCE‐DEPENDENT SETUP TIMES

Abstract

Job‐release mechanisms in job‐shop control are receiving increased recognition in recent research. However, there is considerable disagreement over the benefits of sophisticated job‐release mechanisms, and they remain to be tested in various operating environments.

In our study, we extend previous job‐releasing research by examining several job‐release mechanisms in a different operating environment‐a sequence‐dependent setup job shop. We tested these release mechanisms, originally developed for a machine‐constrained job shop, in conjunction with two groups of sequencing rules‐ordinary and setup‐oriented sequencing rules. We measured shop performance in terms of total cost, the sum of inventory‐holding and late‐penalty costs. We developed a simulation model of a nine‐machine job shop for our experiment.

Keywords

ORDER‐RELEASE MECHANISM JOB SHOP SETUP TIME SIMULATION

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