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One of the key elements in condition-based maintenance is to predict the distribution of time to a pre-specified degradation limit based on the observed degradation paths. The prediction accuracy strongly depends on the method to fit the observed degradation paths to a mean degradation model. Since the recent observations contain more information about the future degradation trend than the earlier...
Condition-based maintenance often needs to solve population-oriented decision problems (e.g., determination of preventive maintenance, opportunistic maintenance and spare part order thresholds). It would be much convenient to solve such decision problems based on a state-based residual life distribution, whose parameters depend on degradation amount. In this paper, we propose a new approach to find...
A degradation process is usually non-linear, and hence there exists one or more change points, where the degradation rate changes quickly. It is useful to determine the change points, e.g., designing an inspection scheme and predicting the time to a functional failure. It is an important issue how to specify the change points. This paper addresses this issue. A spline function with unknown knots is...
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