Design of accelerated life test plans under progressive Type II interval censoring with random removals |
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Authors: | Chang Ding Siu-Keung Tse |
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Institution: | 1. Statistics and Mathematics College , Yunnan University of Finance and Economics , 237 Longquan Road, Kunming , Yunnan Province , P. R. China dingchang81@gmail.com;3. Department of Management Sciences , City University of Hong Kong , Tat Chee Avenue, Kowloon , Hong Kong |
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Abstract: | This paper investigates the design of accelerated life test (ALT) plans under progressive Type II interval censoring with random removals. Units’ lifetimes are assumed to follow a Weibull distribution, and the number of random removals at each inspection is assumed to follow a binomial distribution. The optimal ALT plans, which minimize the asymptotic variance of an estimated quantile at use condition, are determined. The expected duration of the test and the expected number of inspections on each stress level are calculated. A numerical study is conducted to investigate the properties of the derived ALT plans under different parameter values. For illustration purpose, a numerical example is also given. |
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Keywords: | accelerated life test interval inspection progressive Type II censoring random removal Weibull distribution |
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