A general accelerated life model for step-stress testing

Wenbiao Zhao, Elsayed A. Elsayed

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


In this paper we propose a general accelerated life model for step-stress testing and present a general likelihood function formulation for step-stress models that use both Weibull and lognormal distributions. The proposed model is also applicable to any life distribution in which the stress level only changes the scale parameter of the distribution, and can also be extended to multiple-stress as well as profiled testing patterns. Algorithms for fitting and testing such models are described and illustrated. The model provides a convenient way to interpret the step-stress accelerated life testing results. The practical use of the proposed statistical inference model is demonstrated by a case study.

Original languageEnglish (US)
Pages (from-to)1059-1069
Number of pages11
JournalIIE Transactions (Institute of Industrial Engineers)
Issue number11
StatePublished - Nov 2005

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering


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