Bayesian analysis for step-stress accelerated life testing using weibull proportional hazard model

Naijun Sha, Rong Pan

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

In this paper, we present a Bayesian analysis for the Weibull proportional hazard (PH) model used in step-stress accelerated life testings. The key mathematical and graphical difference between the Weibull cumulative exposure (CE) model and the PH model is illustrated. Compared with the CE model, the PH model provides more flexibility in fitting step-stress testing data and has the attractive mathematical properties of being desirable in the Bayesian framework. A Markov chain Monte Carlo algorithm with adaptive rejection sampling technique is used for posterior inference. We demonstrate the performance of this method on both simulated and real datasets.

Original languageEnglish (US)
Pages (from-to)715-726
Number of pages12
JournalStatistical Papers
Volume55
Issue number3
DOIs
StatePublished - Jul 2014

Keywords

  • Bayesian inference
  • Cumulative exposure model
  • Proportional hazard model
  • Step-stress accelerated life test
  • Weibull distribution

ASJC Scopus subject areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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