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My first technical paper and it's on accelerated degradation modeling. My entry to reliability engineering.
Engineering degradation tests allow industry to assess the potential life span of longlife products
that do not fail readily under accelerated conditions in life tests. A general statistical model is presented here for
performance degradation of an item of equipment. The degradation process in the model is taken to be a Wiener
diffusion process with a time scale transformation. The model incorporates Arrhenius extrapolation for high stress
testing. The lifetime of an item is defined as the time until performance deteriorates to a specified failure threshold.
The model can be used to predict the lifetime of an item or the extent of degradation of an item at a specified future
time. Inference methods for the model parameters, based on accelerated degradation test data, are presented. The
model and inference methods are illustrated with a case application involving selfregulating heating cables. The
paper also discusses a number of practical issues encountered in applications.
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