Tooling constraints and shop floor scheduling: A simulation study
通过仿真模型研究工装可用性对车间绩效的影响，发现工装分配规则需同时考虑作业优先级和工装可用性，为有限工装下的订单管理提供建议。
Abstract Research into the problems of job shop scheduling has dealt with two of three major categories of shop floor resources: machine capacity and labor. Generally ignored has been the impact of tooling constraints, the third form of shop floor resource, on the scheduling process. The impact of tooling is the focus of this study. Using a simple simulation model of a shop operating under varying levels of tooling availability, it is shown that the level of tooling availability has a significant impact on shop floor performance as measured in terms of mean flow time, mean tardiness, number jobs tardy and number of tool changes. Four different tooling assignment rules are evaluated and their effect on system performance is described. The results indicate that tooling assignment rules should consider both job priorities and tooling availability in order to achieve good shop performance. The paper concludes with general recommendations for the management of shop orders facing limited tooling availability.