Statistically Precise and Energy Efficient Accelerated Life Testing

Haitao Liao, Dan Zhang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The basic idea of accelerated life testing (ALT) is to expose test units of a product to harsher-than-normal operating conditions to expedite failures so that the failure time distribution of the product and the associated life-stress relationship can be determined in a short time period. However, ALT often consumes significant amounts of energy. To avoid waste of energy in a wide spectrum of product development processes, we explore a new experimental design methodology that improves the reliability estimation precision of an ALT experiment while minimizing the total energy consumption of the experiment. The resulting optimally designed ALT experiment depends not only on the reliability of the product to be tested but also on the characteristics of the test equipment and the capability of its controller. A numerical example is provided to demonstrate the use of the methodology in practice.

Original languageEnglish (US)
Pages (from-to)992-998
Number of pages7
JournalSAE International Journal of Materials and Manufacturing
Issue number1
StatePublished - Apr 2011
Externally publishedYes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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