| Summary: | 碩士 === 國立臺灣科技大學 === 工業管理系 === 107 === With the rapid development of technology, the design of equipment in both life and engineering applications becomes more complex and precise, but the structures are similar. Consisting of main component, functional component and auxiliary component. In general, there is an interaction between the main component and the functional component. When one of them fails, the system stops working. However, there is another situation between the main component and the auxiliary component. When the auxiliary component fails, the system will not stop working, but it will increase the probability of the failure of the main component. Traditionally, the failures of components have been considered as independent or interactive, but no one-way failure interaction has been considered. Therefore, this paper constructs the expected total cost rate model of two-components system, which the main component is one-way influenced by the auxiliary component. In this model, each failure of the component is recovered by minimal repairs. But the number of failures will increase more frequently. Therefore, in order to reduce the excessive repair cost, will be performed to bring the component back to the initial condition. This paper investigates the optimal replacement strategy for the system with two components, so that the expected total cost is the minimized, and same numerical examples are used to analyze the impact of replacement cost on the expected total cost rate.
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