Optimal design of proportional hazards based accelerated life testing plans

E. A. Elsayed, Lixia Jiao

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Accelerated life testing (ALT) is a widely used approach that estimates reliability of components or systems at normal operating conditions using data obtained at accelerated conditions. The accuracy of reliability estimates depends on the stress types, stress levels and corresponding sample sizes. In this paper, we present an efficient and practical approach for determining the appropriate stress levels and sample sizes of test units so as to obtain the most accurate reliability estimates at normal operating conditions. The optimal test plans are based on the proportional hazards model.

Original languageEnglish (US)
Pages (from-to)411-424
Number of pages14
JournalInternational Journal of Materials and Product Technology
Issue number5-6
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


  • Accelerated life test
  • Maximum likelihood estimate
  • Minimization of variance
  • Proportional hazards


Dive into the research topics of 'Optimal design of proportional hazards based accelerated life testing plans'. Together they form a unique fingerprint.

Cite this