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The assumption of normality is usually tied to the design and analysis of an experimental study. However, when dealing with lifetime testing and censoring at fixed time intervals, we can no longer assume that the outcomes will be normally distributed. This generally requires the use of optimal design techniques to construct the test plan for specific distribution of interest. Optimal designs in this...
Accelerated degradation tests (ADTs) are often applied for assessing the reliability of highly reliable products, but it is realized that ADT experiment can also be used as a tool for improving product design. In particular, when external stress factors are not constants in a product-s use environment, it is necessary to utilize ADT experiments to investigate the interaction between these stress factors...
In this paper we present a Bayes inference model for a simple step-stress accelerated life test (SSALT) using type-II censored samples. We assume that the failure times at each stress are exponentially distributed with a mean that is a log-linear function of the natural stress level, and derive a likelihood function for the SSALT model under type-II censoring. We integrate the engineering knowledge...
Reliability demonstration tests for non-repairable systems have been extensively discussed by many researchers. However, very few works have been done for repairable system tests. Demonstration tests for repairable systems can be time consuming and costly. Carefully planning sample size and test duration is very important. This paper develops a theoretical method, based on pivotal quantities and a...
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