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Statistical analysis for masked hybrid system lifetime data in step-stress partially accelerated life test with progressive hybrid censoring

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  • Xiaolin Shi
  • Yanchao Liu
  • Yimin Shi

Abstract

In this paper, we investigate a step-stress partially accelerated lifetime test for the four-component hybrid systems with Type-II progressive hybrid censoring scheme while the life time of system component follows exponential failure rate. In many cases, the exact component causing the system failure cannot be identified and the cause of failure is masked. Based on Type-II progressively hybrid censored and masked data, the maximum likelihood estimations for unknown parameters and acceleration factor are obtained. In addition, approximate confidence interval and bootstrap confidence interval are presented by using the asymptotic distributions of the maximum likelihood estimations for unknown parameters and bootstrap method, respectively. Finally, the proposed method is illustrated through the simulation studies.

Suggested Citation

  • Xiaolin Shi & Yanchao Liu & Yimin Shi, 2017. "Statistical analysis for masked hybrid system lifetime data in step-stress partially accelerated life test with progressive hybrid censoring," PLOS ONE, Public Library of Science, vol. 12(10), pages 1-15, October.
    • Handle: RePEc:plo:pone00:0186417
    DOI: 10.1371/journal.pone.0186417
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