Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)

The Korean Reliability Society (한국신뢰성학회)
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Planning Practical Multiple-Stress Accelerated Life Tests

실용적 복합 가속수명시험 계획의 개발

  • Bae, Bong-Soo (Department of Industrial & Management Systems Engineering, Dong-A University) ;
  • Seo, Sun-Keun (Department of Industrial & Management Systems Engineering, Dong-A University)
  • 배봉수 (동아대학교 산업경영공학과) ;
  • 서순근 (동아대학교 산업경영공학과)
  • Received : 2017.04.17
  • Accepted : 2017.06.14
  • Published : 2017.06.25
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Abstract

Purpose: The most previous works on designing accelerated life tests (ALTs) are focused on the application of a single stress. Because of the difficulty to obtain the sufficient information in a reasonable duration using single stress only, there is needed in practice to use multiple-stress ALTs frequently. This paper presents new practical plans with two stresses for Weibull distribution. Methods: The four-level practical plans based on rectangle test region are proposed and compared with the corresponding three-level statistically optimal plans. Sensitivity analyses for assumed design parameters and life-stress relationship are conducted. Results: A procedure to choose practical ALT plans is illustrated with a numerical example and guidelines for planning two-stress ALTs are provided. Conclusion: The proposed two-stress ALT plans on practical constraints to assess a quantile of Weibull lifetime distribution at the use condition are efficient and robust.

Keywords

References

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