模糊车间作业调度的三点满意度模型

Three-point satisfaction-degree model for fuzzy job-shop scheduling problem

将不确定的加工时间用三角模糊数表示,研究了梯形软交货期下的模糊车间作业满意调度问题.通过梯形交货期和三角模糊完工时间确定的两个悲观点实现了客户对产品提前或拖期情形下的悲观满意度,同时兼顾最可信满意度,利用三点满意度的组合优化建立了优化目标.仿真实验结果表明,所建立三点满意调度模型相对传统悲观调度模型,在保证决策者抗风险偏向的同时,大大提高了最可信满意度水平,实现了更加综合的满意调度.

A fuzzy job-shop satisfaction scheduling problem with a trapezoid due date soft constraint is discussed, where the uncertain processing times of operations are described by triangle fuzzy numbers. The pessimistic satisfaction degree in terms of earlier or later completion time than the due date is realized by identifying two pessimistic points while the possibility for the most possible result being considered, thus the satisfaction scheduling optimization objective is established to maximize the combination of three point satisfaction degrees. The simulation results show that the proposed three-point satisfaction-degree scheduling model can greatly improve the client＇s most possible satisfaction degree while keeping the decision maker＇s risk-resisting preference, and can realize a more comprehensive satisfaction schedule compared with a traditional pessimistic scheduling model.