确定各产品及零件加工顺序,是编制作业计划的关键。理想的安排是:既要保证总的生产周期和产品的成套性,又要使零件在工序间等待时间短、设备空闲时期少。3M×N同顺序的排序选优已有了比较理想的解决方法。但对M>3,不同顺序的排序选优至今尚无比较理想的方法,特别是在多品种,小批单个生产中,零件加工的工序一般都 Determining the processing sequence of each product and part is the key to the preparation of the job plan. The ideal arrangement is to ensure the total production cycle and the completeness of the product, but also to make the parts have short waiting time between processes and less equipment idle time. 3M×N has the ideal solution to the optimization of sorting in the same order. But for M>3, there is no ideal method for sorting and sorting in different orders so far, especially in multi-variety, small-batch individual production, the parts processing procedures are generally