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Activity Number:
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147
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Type:
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Contributed
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Date/Time:
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Monday, August 7, 2006 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Physical and Engineering Sciences
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| Abstract - #306506 |
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Title:
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Accelerate Life Test Planning with Independent Weibull Competing Risks with Known Shape Parameter
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Author(s):
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Francis Pascual*+
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Companies:
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Washington State University
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Address:
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Mathematics Department, Pullman, WA, 99164-3113,
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Keywords:
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Arrhenius relationship ; d-optimality ; Fisher information ; maximum likelihood ; inverse-power relationship ; time failure censoring
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Abstract:
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We present methodology for accelerated life test (ALT) planning when there are two or more failure modes or competing risks which are dependent on one accelerating factor. We assume that the failure modes have respective latent failure times, and the minimum of these times corresponds to the product lifetime. The latent failure times are assumed to be independently distributed Weibull with known common shape parameter. We present expressions for the Fisher information matrix and test plan criteria. We apply the methodology to ALT of Class-H insulation for motorettes where temperature is the accelerating factor. We also present two-level and 4:2:1 allocation test plans based on determinants and on estimating quantiles or hazard functions.
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