Advances and Applications in Statistics
Volume 7, Issue 1, Pages 81 - 95
(April 2007)
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OPTIMAL STEP-STRESS ACCELERATED LIFE TEST PLANS WITH PROGRESSIVE TYPE-II CENSORING
Lii-Yuh Leu (Taiwan) and Kuan-Fu Shen (Taiwan)
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Abstract: This paper considers the analysis of exponentially distributed lifetime data observed under k-stage step-stress accelerated life test with progressive type-II censoring. We compute the expected Fisher information and the asymptotic variance-covariance matrix of the maximum likelihood estimator of the log mean life at design (use) stress. The problem of choosing the optimal proportion is addressed using variance-(V) optimality as well as determinant-(D) optimality criteria. An illustrative example is provided with discussion. |
Keywords and phrases: progressive censoring (PC), step-stress, accelerated life testing, asymptotic variance, V-optimality, D-optimality. |
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