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Abstract

A previous paper ¹ described the design of a simulation model. This model, written in GASP IV, allows the management of a large machine shop to try out policies under realistic assump tions without disrupting operations.

This paper outlines the results of approximately 30 "runs" on the model, which are designed to provide an insight into the ef fects of modifying the batch sizes used in the machine shop. The results obtained suggest that the major impact of increased batch sizes is on the flow of work through the plant. The overall conclusion is that the current manufacturing system cannot ac commodate larger batch sizes. The presently used batch sizes suit the configuration of work centres and the deployment of labour in the job shop.

Keywords

computer-aided analysis computer-aided manufacturing (CAM)decision-making discrete simulation

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References

Browne, J. and Davies, B.J. "A Simulation Model of a Machine Shop." In SimulaUon for Production and Inventory Control ( H. Bekiroglu , ed.) (in press).

Browne, J. , Boon, J.E. , and Davies, B.J. "Job Shop Control." International Journal of Production Research 19:6, 633-643.

Browne, J. "Simulation Study of a Job Shop." PhD thesis. University of Manchester Institute of Science and Technology, Manchester, United Kingdom (1980).

Eilon, S. , Chowdhury, I.G. , and Serghion, S.S. "Experiments With the SIx Rule in Job Shop Scheduling." Simulation 24:2 (1975), 45-48.

A preliminary review of batch sizes in a job shop using a digital simulation model

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