Optimal constant-stress accelerated life test plans for one-shot devices with components having exponential lifetimes under gamma frailty models

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1 Citation (Scopus)

Abstract

Optimal designs of constant-stress accelerated life test plans is one of the important topics in reliability studies. Many devices produced have very high reliability under normal operating conditions. The question then arises of how to make the optimal decisions on life test plans to collect sufficient information about the corresponding lifetime distributions. Accelerated life testing has become a popular approach to tackling this problem in reliability studies, which attempts to extrapolate from the information obtained from accelerated testing conditions to normal operating conditions. In this paper, we develop a general framework to obtain optimal constant-stress accelerated life test plans for one-shot devices with dependent components, subject to time and budget constraints. The optimal accelerated test plan considers an economical approach to determine the inspection time and the sample size of each accelerating testing condition so that the asymptotic variance of the maximum likelihood estimator for the mean lifetime under normal operating conditions is minimized. This study also investigates the impact of the dependence between components on the optimal designs and provides practical recommendations on constant-stress accelerated life test plans for one-shot devices with dependent components. Copyright © 2022 by the authors.
Original languageEnglish
Article number840
JournalMathematics
Volume10
Issue number5
DOIs
Publication statusPublished - 01 Mar 2022

Citation

Ling, M.-H. (2022). Optimal constant-stress accelerated life test plans for one-shot devices with components having exponential lifetimes under gamma frailty models. Mathematics, 10(5). Retrieved from https://doi.org/10.3390/math10050840

Keywords

  • Gamma frailty
  • Exponential distribution
  • Constant-stress accelerated life tests
  • One-shot devices
  • Optimal designs
  • Time and budget constraints

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