Statistical Analysis of Exponential Lifetimes Under an Adaptive Type-II Progressive Censoring Scheme

被引:141
|
作者
Ng, Hon Keung Tony [1 ]
Kundu, Debasis [2 ]
Chan, Ping Shing [3 ]
机构
[1] So Methodist Univ, Dept Stat Sci, Dallas, TX 75275 USA
[2] Indian Inst Technol, Dept Math & Stat, Kanpur 208016, Uttar Pradesh, India
[3] Chinese Univ Hong Kong, Dept Stat, Shatin, Hong Kong, Peoples R China
关键词
Life testing; maximum likelihood estimator; asymptotic methods; coverage probability; exponential distribution; METHODOLOGY;
D O I
10.1002/nav.20371
中图分类号
C93 [管理学]; O22 [运筹学];
学科分类号
070105 ; 12 ; 1201 ; 1202 ; 120202 ;
摘要
In this article, a mixture of Type-I censoring and Type-II progressive censoring schemes, called an adaptive Type-II progressive censoring scheme, is introduced for life testing or reliability experiments. For this censoring scheme, the effective sample size in is fixed in advance, and the progressive censoring scheme is provided but the number of items progressively removed from the experiment upon failure may change during the experiment. If the experimental time exceeds a prefixed time T but the number of observed failures does not reach m, we terminate the experiment as soon as possible by adjusting the number of items progressively removed from the experiment upon failure. Computational formulae for the expected total test time are provided. Point and interval estimation of the failure rate for exponentially distributed failure times are discussed for this censoring scheme. The various methods are compared using Monte Carlo simulation. (C) 2009 Wiley Periodicals, Inc. Naval Research Logistics 56: 687-698 2009
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页码:687 / 698
页数:12
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