Geometric imperfect preventive maintenance and replacement (GIPMAR) model for aging repairable systems
International Journal of Quality & Reliability Management
ISSN: 0265-671X
Article publication date: 30 December 2021
Issue publication date: 25 January 2023
Abstract
Purpose
This work seeks to develop a geometric imperfect preventive maintenance (PM) and replacement model (GIPMAR) for aging repairable systems due to age and prolong usage that would meet users need in three phases: within average life span, beyond average life span and beyond initial replacement age of system.
Design/methodology/approach
The authors utilized the geometric process (GP) as the hazard function to characterize the increasing failure rate (IFR) of the system. The GP hazard function was incorporated into the hybridized preventive and replacement model of Lin et al. (2000). The resultant expected cost rate function was optimized to obtain optimum intervals for PM/replacement and required numbers of PM per cycle. The proposed GIPMAR model was applied to repairable systems characterized by Weibull life function and the results yielded PM/replacement schedules for three different phases of system operation.
Findings
The proposed GIPMAR model is a generalization of Lin et al. (2000) PM model that were comparable with results of earlier models and is adaptive to situations in developing countries where systems are used across the three phases of operation depicted in this work. This may be due to economic hardship and operating environment.
Practical implications
The proposed model has provided PM/Replacement schedules for different phases of operation which was never considered. This would provide a useful guide to maintenance engineers and end-users in developing countries with a view to minimizing the average cost of maintenance as well as reducing the number of down times of systems.
Social implications
A duly implemented GIPMAR model would ensure efficient operation of systems, optimum man-hour need in the organization and guarantee customer's goodwill in a competitive environment.
Originality/value
In this work, the authors have extended Lin et al. (2000) PM model to provide PM/replacement schedules for aging repairable systems which was not provided for in earlier existing models and literature.
Keywords
Acknowledgements
The authors are grateful to the Tertiary Education Trust Fund (Tetfund) Nigeria for funding this research which was part of my PhD thesis.
Citation
Udoh, N. and Effanga, E. (2023), "Geometric imperfect preventive maintenance and replacement (GIPMAR) model for aging repairable systems", International Journal of Quality & Reliability Management, Vol. 40 No. 2, pp. 566-581. https://doi.org/10.1108/IJQRM-04-2020-0125
Publisher
:Emerald Publishing Limited
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