Conventional shop control procedures to approximate JIT inventory performance in a job shop

A two-stage simulation analysis shows that for certain types of manufacturers it is more appropriate to adjust shop control procedures to approximate just-in-time (JIT) inventory rather than to incur a major overhaul in the production system. In the first stage, screening experiments are performed to select the best dispatching rule, allowance-setting rule, batch size, and cycle time. Next, the performance of the selected conventional shop control factors is compared with the kanban simulation results. The results indicate that there are conventional shop control procedures that perform better than JIT in a job shop. It is observed that, even with adequate capacity, bottleneck areas surface due to fluctuation in the shop load. JIT is not appropriate in such a situation. The paper concludes that all shop control approaches do not perform equally well in a good manufacturing environment.

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