Optimum accelerated life testing plans based on proportional mean residual life

Wenbiao Zhao, Elsayed A. Elsayed

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


In this paper, we present an efficient and practical approach for designing accelerated life testing (ALT) plans based on the proportional mean residual life (PMRL) regression model. The plans determine the appropriate levels for each stress type and the number of test units allocated to each level in order to obtain accurate mean residual life estimates at normal operating conditions. Unlike previous ALT plans, the proposed plans need not assume the life-stress relationship. A numerical example that demonstrates the design of such accelerated plans is presented. The proposed plans can also be applied in situations with more than a single accelerating stress without any difficulties.

Original languageEnglish (US)
Pages (from-to)701-713
Number of pages13
JournalQuality and Reliability Engineering International
Issue number7
StatePublished - Nov 2005

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Management Science and Operations Research


  • Accelerated life testing
  • Design of test plans
  • Proportional mean residual life


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