Multiple step-stress accelerated life test: the tampered failure rate model |
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| Authors: | Mohamed T Madi |
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| Institution: | Department of Statistics , UAE University , Al-Ain, United Arab EmiratesP.O. Box 17555 |
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| Abstract: | Battacharyya and Soejoeti (1989) proposed the tampered failure rate model for step-stress accelerated life testing. In this note, their model is generalized from the simple (2-step) step-stress setting to the multiple (k-step, k > 2) setting. For the parametric setting where the life distribution under constant stress is Weibull, maximum likelihood estimation is investigated and the situation where the different stress levels are equispaced is looked at. |
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| Keywords: | Multiple step-stress failure rate Weibull distribution mazimum likelihood equispaced stresses |
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