{"title":"Characterization of optimal age-replacement policies","authors":"C. Cassady, L. Maillart, R. Bowden, B. Smith","doi":"10.1109/RAMS.1998.653714","DOIUrl":null,"url":null,"abstract":"The intention of the effort presented is to characterize the solution to a general class of preventive maintenance optimization problems. Successive lengths of operating periods and the successive repair times for a piece of equipment are each assumed to be i.i.d. Weibull random variables. The equipment is subjected to an age replacement preventive maintenance policy and the successive preventive maintenance times are assumed to be i.i.d. Weibull random variables. An optimal age replacement policy is a policy, T/sub age/*, that maximizes A/sub avg/(T/sub use/), the average availability of the equipment over its useful life (T/sub use/</spl infin/). The relationship between T/sub age/* and the parameters of the previously mentioned Weibull distributions is approximated by a first-order polynomial function. The model is formulated through regression analysis of data obtained through simulation-optimization techniques. Model validation is presented. In general, the model predicts an optimal T/sub age/ close to the true optimal. The model, however, tends to prescribe less frequent preventive maintenance than the true optimal policy and is not useful in some in situations where the true optimal T/sub age/ is very small.","PeriodicalId":275301,"journal":{"name":"Annual Reliability and Maintainability Symposium. 1998 Proceedings. International Symposium on Product Quality and Integrity","volume":"59 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1998-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annual Reliability and Maintainability Symposium. 1998 Proceedings. International Symposium on Product Quality and Integrity","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RAMS.1998.653714","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 12
Abstract
The intention of the effort presented is to characterize the solution to a general class of preventive maintenance optimization problems. Successive lengths of operating periods and the successive repair times for a piece of equipment are each assumed to be i.i.d. Weibull random variables. The equipment is subjected to an age replacement preventive maintenance policy and the successive preventive maintenance times are assumed to be i.i.d. Weibull random variables. An optimal age replacement policy is a policy, T/sub age/*, that maximizes A/sub avg/(T/sub use/), the average availability of the equipment over its useful life (T/sub use/