Residual-life estimation for components with non-symmetric priors

Santanu Chakraborty, Nagi Gebraeel, Mark Lawley and Hong Wan

IISE Transactions, 2009, vol. 41, issue 4, 372-387

Abstract: Condition monitoring uses sensory signals to assess the health of engineering systems. A degradation model is a mathematical characterization of the evolution of a condition signal. Our recent research focuses on using degradation models to compute residual-life distributions for degrading components. Residual-life distributions are important for providing probabilistic estimates of failure time for use in maintenance planning and spare parts inventory management. To obtain residual-life distributions, our earlier work assumed the degradation model's stochastic parameters to be normally distributed. This paper investigates the performance of these residual-life distributions when the underlying normality assumptions are not satisfied. The paper also develops methods for estimating residual-life when the stochastic parameters of the degradation model follow more general distributions.

Date: 2009
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DOI: 10.1080/07408170802369409

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