An accelerated life testing model involving performance degradation

Wenbiao Zhao, E. A. Elsayed

Research output: Contribution to journalConference articlepeer-review

50 Scopus citations


Competing risk problems involving degradation failures are becoming increasingly common and important in practice. In this paper, we investigate the modeling of competing risk problems involving both catastrophic and degradation failures under accelerated conditions. By modeling the degradation process as a Brownian motion process for which the first passage time to a boundary is considered as the soft failure, and by modeling hard failures as a Weibull distribution enable us to model accelerated testing in a natural way, make inferences about the parameters of the degradation process and predict the reliability of products at the operating conditions. The methodology is demonstrated and validated using a real case study.

Original languageEnglish (US)
Pages (from-to)324-329
Number of pages6
JournalProceedings of the Annual Reliability and Maintainability Symposium
StatePublished - 2004
EventAnnual Reliability and Maintainability Symposium - 2004 Proceedings: International Symposium on Product Quality and Integrity - Los Angeles, CA., United States
Duration: Jan 26 2004Jan 29 2004

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Engineering(all)
  • Safety, Risk, Reliability and Quality
  • Mathematics(all)
  • Computer Science Applications


  • Accelerated Testing
  • Brownian Process
  • Catastrophic Failure
  • Competing Risks
  • Degradation

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