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Sequential Test for Arbitrary Ratio of Mean Times Between Failures

Author

Listed:
  • Yefim H. Michlin

    (Technion- Israel Institute of Technology, Israel)

  • Dov Ingman

    (Technion-Israel Institute of Technology, Israel)

  • Yoram Dayan

    (ELTA Systems Ltd., Israel)

Abstract

This paper describes a planning methodology and tools for a truncated SPRT (sequential probability ratio test) for checking the means ratio of the times between failures (assumed to be exponentially distributed) of two items. The problem is considered for the situation in which the ratio may differ from unity, whereby the results are applicable for any specified ratio, or wherever multiple copies of each item are tested simultaneously (group test). The authors present a methodology for optimal test choice and dependences for determining the acceptance/rejection boundaries of such a test with given characteristics. Planning and implementation of a group test are illustrated in an example, including substantiation of the choice of the number of new-item copies.

Suggested Citation

  • Yefim H. Michlin & Dov Ingman & Yoram Dayan, 2011. "Sequential Test for Arbitrary Ratio of Mean Times Between Failures," International Journal of Operations Research and Information Systems (IJORIS), IGI Global, vol. 2(1), pages 66-81, January.
    • Handle: RePEc:igg:joris0:v:2:y:2011:i:1:p:66-81
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