Modified age-based replacement

Scarf, Philip, Cavalcante, Cristiano, Alotaibi, Naif, Ribeiro de Melo, Yan and Rodrigues, Augusto 2024. Modified age-based replacement. Reliability Engineering & System Safety 245 , 110022. 10.1016/j.ress.2024.110022

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Abstract

The maintenance policy of age-based replacement (ABR) is widely specified in OEM instructions. The practical application of ABR raises concerns about ensuring consistent adherence to prescribed replacement schedules for extended periods. ABR lacks periodicity, resulting in scheduling asynchrony with designated time slots, while alternative policies such as block replacement (BR) provide periodicity at the expense of efficiency. Additionally, scepticism about ABR is based on its simplicity and restrictive assumptions, which include ideal replacements and the one-component system assumption. The task of estimating component lifetime distributions and defining critical parameters such as cost of failure, which is an average cost with varying downtime, presents significant challenges. We study “modified age-based replacement” (MABR) in response to the limitation of periodicity, so that preventive replacements exhibit quasi-periodic behaviour. We quantify the cost-inefficiency of MABR compared to ABR, thus informing the practical implications of introducing periodicity into the ABR policy and highlighting the need to incorporate real-world constraints, such as time slots for maintenance actions. The findings indicate that MABR and a special case are reasonably efficient provided the slot-interval is not too large. This is a useful insight for practical application of ABR type policies for scheduling preventive maintenance.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Business (Including Economics)
Publisher:	Elsevier
ISSN:	0951-8320
Date of First Compliant Deposit:	15 February 2024
Date of Acceptance:	15 February 2024
Last Modified:	04 Apr 2024 09:34
URI:	https://orca.cardiff.ac.uk/id/eprint/166337

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