Joint optimal periodic and conditional maintenance strategy
Abstract
Purpose
In this paper, an optimal periodic replacement strategy is proposed. This strategy suggests new items to perform replacements at failure. Preventive replacements, scheduled at instants kT (k=1, 2,…) are carried out only if the item's age exceeds a threshold to be determined. Parameters T and b are derived from an optimization model aiming to maximize the steady state availability under budgetary constraints or to minimize the expected total cost per unit of time over an infinite horizon, while the steady state availability must be higher than some given threshold. Costs and durations associated with replacement actions are supposed to be known.
Design/methodology/approach
Employs mathematical models to investigate the expected cost rate and the steady state availability with illustrative examples.
Findings
Analytical and numerical results have been obtained for a system whose lifetime is distributed according to an Erlang distribution.
Practical implications
The proposed strategy seems more efficient than the basic block replacement strategy aiming to maximize the steady state availability. It is also easy to implement.
Originality/value
This new strategy would appear to be more efficient than the previous basic block replacement strategy.
Keywords
Citation
Jamali, M.A., Ait‐Kadi, D., Cléroux, R. and Artiba, A. (2005), "Joint optimal periodic and conditional maintenance strategy", Journal of Quality in Maintenance Engineering, Vol. 11 No. 2, pp. 107-114. https://doi.org/10.1108/13552510510601311
Publisher
:Emerald Group Publishing Limited
Copyright © 2005, Emerald Group Publishing Limited