Effects of Process planning Upon Production Scheduling under concurrent Environment

Concurrent realization method of process planning and production scheduling was suggested in the case of integrated environment, establishes the models of process planning and production scheduling integrated system. The models can classify process planning and production scheduling into different stages. The relations between process planning and production scheduling are analyzed aiming at process planning at the different stages and the tasks of production scheduling. The concurrent operation model is adopted to make the both closely combined with each other, on the basis of which, this paper discusses the effects of the concurrent process plan upon the disciplinarians of scheduling results, and advances the realization of multi-process alternative scheduling algorithm. The simulation tests indicate that using multi-process patterns to carry out scheduling is better than mono-using basic process plan to schedule so that the scheduling complexity is greatly reduced. And the maximum flow time and mean flow time of working pieces is reduced by 30% and 14% respectively, while machine-tool utilization rate is raised by 40%. This indicates that under the integrated patterns, the concurrent integration of process planning and production scheduling is an effective way to improve the efficiency of the production system