Time-Based Preventive Maintenance without Time Shifts

Hristoski, Ilija and Janevska, Gordana and Kostov, Mitko (2025) Time-Based Preventive Maintenance without Time Shifts. Microwave Review, 31 (2). pp. 45-55. ISSN 2406-1050

Text MWR-2344-6.pdf - Published Version Download (1MB)

Abstract

This paper presents a comprehensive approach to evaluating the time-based preventive maintenance (TbPM) strategy without time shifts by combining modelling and simulation of a generic single-component system using the class of Deterministic and Stochastic Petri Nets (DSPNs) with analytical approximation. The proposed model captures the dynamics among stochastic failures, corrective repairs, and deterministic preventive maintenance cycles, enabling steady-state availability assessment across both low- and high-availability systems. Using TimeNET®, simulation results are obtained for various combinations of Mean Time to Failure (MTTF), Mean Time to Repair (MTTR), Mean Time to Preventive Maintenance (MTPM), and Time to Preventive Maintenance (TTPM). Simulation results reveal distinct behavioural patterns: systems operating under TbPM generally exhibit slightly lower availability than those without preventive maintenance, particularly in high-availability regimes. However, in low-availability systems with short MTTF and properly aligned TTPM, TbPM can marginally enhance availability. The analysis also identifies a non-monotonic dependence of availability on TTPM, indicating the existence of an optimal maintenance interval that balances preventive and corrective actions, while reductions in MTTR yield the most substantial improvements in availability across all regimes. Closed-form expressions derived for approximate availability estimation closely match simulation outcomes, providing an efficient means for optimising maintenance scheduling in reliability-critical systems.

Item Type:	Article
Subjects:	Scientific Fields (Frascati) > Natural sciences > Computer and information sciences Scientific Fields (Frascati) > Natural sciences > Other natural sciences Scientific Fields (Frascati) > Engineering and Technology > Other engineering and technologies
Divisions:	Faculty of Economics
Depositing User:	Prof. Dr. Ilija Hristoski
Date Deposited:	16 Dec 2025 14:24
Last Modified:	16 Dec 2025 14:24
URI:	https://eprints.uklo.edu.mk/id/eprint/11279

Actions (login required)

View Item