Developing a bi-objective imperfect selective maintenance optimization model for multicomponent systems

Abstract

This paper develops a bi-objective imperfect selective maintenance optimization model for a multicomponent system, which carries out missions interspersed with scheduled breaks. Imperfect maintenance (IM) actions are performed on the components during the break to increase the system reliability during the following mission. The level of maintenance performed determines the improvement of the component’s health. A mathematical model with two objective functions is developed to optimize the tradeoffs between the total maintenance cost and the system reliability based on the decision maker’s preferences. Numerical examples are provided to show that the proposed model reaches valid maintenance decisions. Furthermore, it is shown that when high system reliability is required, the optimal decision is not significantly affected by the decision-maker’s preference for one objective or the other.