The impact of order release strategies on the manufacturing performance for shop floor control

In this study, the impact of two order release strategies on the manufactur ing peformance when internal variation is not negligible in a shop environm ent is investigated. Two symmetrical and typical order release strategies, which determine the release timing, are studied. One is a pull-type strateg y that recognizes the job, shop as a full work system, e.g. the just-in-tim e system. The other is a push-type strategy based on input/output control, e.g. the MRP system. First, we explore a way of setting the machine utiliza tion at a specified level for each strategy. Then, we compare these order r elease strategics under the same machine utilization lec-el when internal v ariations, e.g. estimated errors for processing time and machine breakdown are not negligible. Job flow time and lead time are adopted as criteria to measure the manufacturing performance.