2016
DOI: 10.17713/ajs.v38i1.260
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Optimum Times for Step-Stress Cumulative Exposure Model Using Log-Logistic Distribution with Known Scale Parameter

Abstract: In this paper we assume that the life time of a test unit follows a log-logistic distribution with known scale parameter. Tables of optimum times of changing stress level for simple step-stress plans under a cumulative exposure model are obtained by minimizing the asymptotic variance of the maximum likelihood estimator of the model parameters at the design stress with respect to the change time.Zusammenfassung: In diesem Aufsatz wird angenommen, dass die Lebensdauer einer Testeinheit einer log-logistischen Ver… Show more

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Cited by 5 publications
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“…Accelerated life tests (ALTs) can yield life information of a product in a short time [1][2][3]. Constant stress accelerated life tests (CSALTs) have the advantages of theory maturity and high statistical precision, but they require many samples and a long test time.…”
Section: Introductionmentioning
confidence: 99%
“…Accelerated life tests (ALTs) can yield life information of a product in a short time [1][2][3]. Constant stress accelerated life tests (CSALTs) have the advantages of theory maturity and high statistical precision, but they require many samples and a long test time.…”
Section: Introductionmentioning
confidence: 99%