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Fuzzy Petri Nets Based Rescheduling Model for Semiconductor Production and its Application

The rescheduling strategy of semiconductor production refers to deciding when to start a rescheduling procedure and what kind of rescheduling method to be adopted. Both of the two problems are ill-structured and involve some fuzzy and random information. In order to solve this kind of production problem, a fuzzy Petri nets based rescheduling model (FPN-R) is proposed. FPN-R is defined as a 7-tuple, which includes an additional threshold parameter. Based on FPN-R, the fuzzy reasoning approach for rescheduling decision-making is further discussed. At last, an example of rescheduling strategy problem from semiconductor manufacturing is illustrated to show the application and feasibility of the proposed model and reasoning approach.