Step-stress life-testing with random stress-change times for exponential data

Chengjie Xiong, George A. Milliken

Research output: Contribution to journalArticlepeer-review

66 Scopus citations


This paper studies statistical models in step-stress accelerated life-testing when the stress-change times are random. The marginal lifetime distribution of a test unit under a step-stress test plan when the stress change times are random variables is presented. Maximum likelihood estimates for model parameters based on both the marginal and conditional life distributions are considered. An optimum test plan is explored for simple step-stress test when the stress change time is an order statistic from the exponential lifetime under the low-stress level.

Original languageEnglish
Pages (from-to)141-148
Number of pages8
JournalIEEE Transactions on Reliability
Issue number2
StatePublished - 1999


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