A Fuzzy Fluctuation Smoothing Rule for Job Dispatching in a Wafer Fabrication Factory: A Simulation Study

Toly Chen
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Toly Chen: Department of Industrial Engineering and Systems Management, Feng Chia University, Taichung City, Taiwan

International Journal of Fuzzy System Applications (IJFSA), 2012, vol. 2, issue 4, 47-63

Abstract: Job dispatching in a wafer fabrication factory is a difficult task, mainly due to the complexity of the production system and the uncertainty involved in the production activities. Recently, a number of advanced dispatching rules were proposed, which estimate the remaining cycle times of jobs. This predictive nature is conducive to the effectiveness of these rules. If the uncertainty in the remaining cycle time can be better considered, incorrect scheduling will possibly be reduced. The tailored nonlinear fluctuation smoothing rule for mean cycle time (TNFSMCT) is fuzzified in this study, by expressing the remaining cycle time with a fuzzy value. The effectiveness of the proposed methodology is illustrated with a simulation study.

Date: 2012
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