An asset residual life prediction model based on expert judgments
Wang, W and Zhang, W 2008, 'An asset residual life prediction model based on expert judgments' , European Journal of Operational Research, 188 , pp. 496-505.
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An appropriate and accurate residual life prediction for an asset is essential for cost effective and timely maintenance planning and scheduling. The paper reports the use of expert judgments as the additional information to predict a regularly monitored asset’s residual life. The expert judgment is made on the basis of measured condition monitoring parameters, and is treated as a random variable, which may be described by a probability distribution due to the uncertainty involved. Since most expert judgments are in the form of a set of integer numbers, we can either directly use a discrete distribution or use a continuous distribution after some transformation. A key concept used in this paper is condition residual life where the residual life at the point of checking is conditional on, among others, the past expert judgments made on the same assetto date. Stochastic filtering theory is used to predict the residual life given available expert judgments. Artificial, simulated and real data are used for validating and testing the model developed.
|Uncontrolled Keywords:||Expert judgment; Condition monitoring; Condition based maintenance; Conditional residual life|
|Themes:||Subjects / Themes > Q Science > QA Mathematics > QA275 Mathematical Statistics
Subjects outside of the University Themes
|Schools:||Colleges and Schools > College of Business & Law > Salford Business School > Operations and Information Management|
|Journal or Publication Title:||European Journal of Operational Research|
|Funders:||Engineering and Physical Sciences Research Council (EPSRC)|
|Depositing User:||W Wang|
|Date Deposited:||24 Nov 2009 09:40|
|Last Modified:||28 Jul 2015 17:37|
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