Condition based maintenance optimization for multi-component systems using proportional hazards model

The objective of condition based maintenance (CBM) is typically to determine an optimal maintenance policy to minimize the overall maintenance cost based on condition monitoring information. The existing work reported in the literature only focuses on determining the optimal CBM policy for a single...

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Bibliographic Details
Published in:Reliability engineering & system safety 2011-05, Vol.96 (5), p.581-589
Main Authors: Tian, Zhigang, Liao, Haitao
Format: Article
Language:English
Subjects:
Applied sciences
Condition based maintenance
Condition monitoring
Cost engineering
Economic dependency
Economics
Exact sciences and technology
Hazards
Linear inference, regression
Maintenance
Mathematical models
Mathematics
Multi-component systems
Operational research and scientific management
Operational research. Management science
Optimization
Policies
Probability and statistics
Proportional hazards model
Reliability theory. Replacement problems
Sciences and techniques of general use
Statistics
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Summary:The objective of condition based maintenance (CBM) is typically to determine an optimal maintenance policy to minimize the overall maintenance cost based on condition monitoring information. The existing work reported in the literature only focuses on determining the optimal CBM policy for a single unit. In this paper, we investigate CBM of multi-component systems, where economic dependency exists among different components subject to condition monitoring. The fixed preventive replacement cost, such as sending a maintenance team to the site, is incurred once a preventive replacement is performed on one component. As a result, it would be more economical to preventively replace multiple components at the same time. In this work, we propose a multi-component system CBM policy based on proportional hazards model (PHM). The cost evaluation of such a CBM policy becomes much more complex when we extend the PHM based CBM policy from a single unit to a multi-component system. A numerical algorithm is developed in this paper for the exact cost evaluation of the PHM based multi-component CBM policy. Examples using real-world condition monitoring data are provided to demonstrate the proposed methods.
ISSN:0951-8320
1879-0836
DOI:10.1016/j.ress.2010.12.023