模糊多目標備用零件配置之研究

Abstract

備用零件的使用目的在於將相同零件以並聯方式相聯以提昇生產設備的系 統可靠度，但是除了考慮生產設備的系統可靠度外，仍有其它相關的目標 要考量，譬如成本支出，生產設備的重量與體積，但這些目標卻和系統可 靠度成負面關係．因此如何在這些相衝突的目標下找出一組最適當的備用 零件配置組合，以使得各目標都能滿意，便是決策者所要研究的重要課題 ．本研究提出一模糊多目標備用零件配置模式，考慮上述目標，以交談式 的多目標決策程序考量目標間的取捨關係，同時考量零件可靠度與成本的 不明確性，並以模糊數來表示其可靠度與成本的歸屬程度，以期能在此環 境下求得一組令決策者滿意的備用零件配置組合． It is well known that redundancy is one of the effective methods to increase the reliability of system. However, cost, weight and volumn of system are also the important criteria for the redundancy allocation problem. In this study,we provide a fuzzy multiple criteria mathematical model for the redundancy allocation problem. The reliability and cost are represent as fuzzy numbers. This redundancy allocation mathematical model is nonlinear and integer programming. We also provide an interactive approach to solve the model. Finally,a numerical example is given to illustrate the approach.