Optimal Design of Partially Accleraated Life Tests for Lognormal Distribution under Type I Censoring

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This paper considers optimal designs of partially accelerated life tests in which test items are first run simultaneously at use condition for a specified time, and the surviving items are then run at accelerated condition until a predetermined censoring time. For items having lognormally distributed lives maximum likelihood estimators (MLEs) of the location and scale parameters of the lifetime distribution at use condition, and the acceleration factor which is the ratio of the mean life at use condition to that at accelerated condition are obtained. The change time is determined to minimize either the asymptotic variance of MLE of the acceleration factor or the generalized asymptotic variance of MLEs of the model parameters.
Publisher
Elsevier BV
Issue Date
1993
Language
English
Article Type
Article
Keywords

REGRESSION RELATIONSHIP; LINEAR ESTIMATION; WEIBULL; PLANS

Citation

RELIABILITY ENGINEERING AND SYSTEM SAFETY, v.40, no.1, pp.85 - 92

ISSN
0951-8320
URI
http://hdl.handle.net/10203/57900
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