Berrade, MD, Scarf, PA and Cavalcante, CAV 2017, 'A study of postponed replacement in a delay time model' , Reliability Engineering & System Safety .
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We develop a delay time model for a one component system with postponed replacement to analyze situations in which maintenance might not be executed immediately upon discovery of a defect in the system. Reasons for postponement are numerous: to avoid production disruption or unnecessary or ineffective replacement; to prepare for replacement; to extend component life; to wait for an opportunity. This paper explores conditions that make postponement cost-effective. We are interested in modelling the reality in which a maintainer either prioritizes functional continuity or is not confident of the inspection test indicating a defective state. In some cases more frequent inspection and a longer time limit for postponement are recommended to take advantage of maintenance opportunities, characterized by their low cost, arising after a positive inspection. However, when the cost of failure increases, a significant reduction in the time limit of postponement interval is observed. The examples reveal that both the time to defect arrival and delay time have a significant effect upon the cost-effectiveness of maintenance at the limit of postponement. Also, more simply, we find that opportunities must occur frequently enough and inspection should be a high quality procedure to risk postponement.
|Schools:||Schools > Salford Business School > Salford Business School Research Centre|
|Journal or Publication Title:||Reliability Engineering & System Safety|
|Depositing User:||Dr Philip Scarf|
|Date Deposited:||19 Apr 2017 09:00|
|Last Modified:||21 Apr 2017 12:34|
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