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Title: Preventive effect of optimal replacement policies
Authors: Jiang, R
Ji, P 
Tsang, AHC
Keywords: Ageing (materials)
Preventive maintenance
Replacement control
Issue Date: 2006
Source: Journal of quality in maintenance engineering, 2006, v. 12, no. 3, p. 267-274 How to cite?
Journal: Journal of Quality in Maintenance Engineering 
Abstract: Purpose: The purpose of this paper is to explore whether or not a preventive replacement model always gives a solution with a specified preventive effect and looks at the relationship between the preventive effect and cost saving. Design/methodology/approach: The age and block replacement policies with the Weibull failure distribution are considered. Measures of the preventive effect associated with specific maintenance policies are derived. Findings: The sufficient condition to achieve a given preventive effect is represented graphically as a function of the system's aging intensity and the cost ratio of failure and preventive replacements. Practical implications: The models developed in the paper will help maintenance engineers to know whether a system is aged or not and then they can make a decision on replacement. Originality/value: The optimal replacement models considered in this paper give a solution with a good preventive effect only if the maintained system is sufficiently aged. The criterion whether or not the system is sufficiently aged is set by the decision-maker based on specific maintenance situations or maintenance objectives.
ISSN: 1355-2511
DOI: 10.1108/13552510610685101
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