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Modeling of Maintenance Policy Choice Based on a Fuzzy DecisionMaking Grid Map
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WANG Jiayue1,ZHOU Binghai2
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(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China；2． School of Mechanical Engineering, Tongji University, Shanghai 201804, China)
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Abstract A model of maintenance policy choice was built based on traditional decisionmaking grid map for building optimal equipment maintenance policy effectively by using fuzzy methods. A decisionmaking grid map was established with the mean downtime and the breakdown frequency as decision criteria. The maintenance policy represented by each region was decided, based on which, the membership functions of decision criteria were built and the degree of satisfaction of the choice maintenance policy related to equipment was evaluated by using a new Fuzzy Weighted Average algorithm. The fuzzy set of the satisfaction degree of maintenance policy cost was built and the new Fuzzy Weighted Average algorithm was used for the second time to decide the optimal maintenance policy. The experiment results show that the model established can solve the problems of the decisionmaking bias brought about by the method of the traditional decisionmaking grid, and that it is flexible and practical because it takes the weight and policy's cost into consideration.
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Received: 14 July 2009
Published: 28 September 2010
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