通常情况下，在一定的制造环境中企业实际生产过程的制造资源是保持不变的，

Under normal circumstances, in a certain manufacturing environment, the manufacturing resources of the actual production process of the enterprise remain unchanged, that is, under the known conditions of the used machine tools, tools and fixtures, the machine tool replacement, tool adjustment and clamping method change All will cause changes in processing time, production efficiency and product quality, which reflect the consideration of processing time, processing cost, processing accuracy, processing efficiency and other factors in the process route design. Therefore, the lowest variable cost of manufacturing resources can be used as the objective function. Obviously, under the premise of satisfying the technological processing sequence and constraint conditions, reducing the number of machine tool changes can improve production efficiency, and reducing the number of tool changes and clamping can improve processing accuracy and ensure product quality.

Usually, in a certain manufacturing environment, the actual production process of the enterprise's manufacturing resources are unchanged, that is, under the conditions of the machine tools, tools and fixtures known, machine tool replacement, tool adjustment and clamping method changes will cause changes in processing time, production efficiency and product quality, thus reflecting the route design of processing time, processing costs, processing accuracy, processing efficiency and other factors, so the lowest cost of manufacturing resources can be used as the target function. Obviously, under the premise of meeting the process processing order and constraints, reducing the number of machine tool replacements can improve production efficiency, reduce the number of knife changes and clips can improve processing accuracy and ensure product quality.

通常情况下，在一定的制造环境中企业实际生产过程的制造资源是保持不变的，即在采用的机床、刀具和夹具已知的条件下，机床的更换、刀具调整及装夹方式的改变都将引起加工时间、生产效率及产品质量的变化，从而反映出工艺路线设计中对加工时间、加工成本、加工精度、加工效率等因素的考量，因此可以采用制造资源变动成本最低为目标函数。显然，在满足工艺加工顺序和约束条件的前提下，减少机床更换次数可提高生产效率，减少换刀及装夹次数可提高加工精度和保证产品质量。<br>