有限な点検回数をもつ貯蔵品の最適点検方策

概要

論文の詳細を見る
A system such as missiles and spare parts of aircrafts is in storage for a long time from the delivery to the usage and its reliability goes down with time. It should be inspected and maintained at periodic times to hold a high reliability. This paper suggests a periodic inspection of a storage system with two kinds of units where unit 1 is inspected and maintained at each inspection and unit 2 is degraded with time. However, a system can not be used at finite numbers of inspections, because it involves some parts which have to be replaced when the total operating times have exceeded a threshold level. A system is replaced at next inspection when it has failed or at N-th inspection, whichever occurs first. Then, the expected cost per unit of time is derived and an optimal time which minimizes it in case of periodic inspections is discussed. Numerical examples are given when failure time distributions are exponential and Weibull ones.
日本信頼性学会の論文
1997-09-10