A generalized linear model approach to designing accelerated life test experiments

A generalized linear model approach to designing accelerated life test experiments

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Article ID: iaor201112612
Volume: 27
Issue: 4
Start Page Number: 595
End Page Number: 607
Publication Date: Jun 2011
Journal: Quality and Reliability Engineering International
Authors: , , , ,
Keywords: experimental design, response surface
Abstract:

Optimal experimental design practices are prominent in many applications. This paper proposes an alternate way of computing the information matrix, a key consideration in planning an accelerated life test. The generalized linear model approach allows optimal designs to be computed using iteratively weighted least-square solutions versus a maximum likelihood method. This approach is demonstrated with an assumed exponential distribution and allows the practitioner to observe the underlying structure of the optimal experimental design matrix and its relationship to important factors such as censoring and a nonlinear response function. Optimality criteria are discussed for both parameter estimation and prediction variance at an intended usage condition, which is typically outside the feasible accelerated test region.

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