Estimation of Reliability in Field – Performance Studies
作者:
J.D. Kalbfleisch,
J.F. Lawless,
期刊:
Technometrics
(Taylor Available online 1988)
卷期:
Volume 30,
issue 4
页码: 365-378
ISSN:0040-1706
年代: 1988
DOI:10.1080/00401706.1988.10488429
出版商: Taylor & Francis Group
关键词: Field-performance data;Likelihood methods;Pseudolikelihood;Regression analysis;Reliability follow-up;Warranty data;Weibull data
数据来源: Taylor
摘要:
Likelihood-based methods are developed for the analysis of field-performance studies with particular attention centered on the estimation of regression coefficients in parametric models.Failure-record dataare those in which the time to failure and the regressor variables are observed only for those items that fail in some prespecified follow-up or warranty period (0,T]. It is noted that for satisfactory inference about baseline failure rates or regression effects it is usually necessary to supplement the failure-record data either by incorporating specific prior information aboutxor by taking a supplementary sample of items that surviveT○. General methods are outlined and specific formulas for various likelihood-based methods are obtained when the failure-time model is exponential or Weibull. In these models the methods are compared with respect to asymptotic efftciency of estimation. Several extensions to more complicated sampling plans are considered.
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