Multi-objective maintenance optimization

The conventional approach to maintenance is based on the observation of only one goal in the process of individual project prioritization. However, it is clear that current maintenance management problem is multi-objective in nature and requires the determination of the optimal maintenance strategy that achieves the best trade-off between multiple conflicting goals such as: (1) to minimize the cost of maintenance activities, (2) to maximize system reliability and component condition, (3) to minimize operation costs, (4) to maintain the facilities with the highest number of priority risks, (5) to maintain facilities with the worst condition of equipment, (6) to maintain component which failure affect the largest number of customers and result in the largest electricity outage, etc. This paper will present a systematic approach to the problem of distribution network maintenance management in the area of multi-objective optimization. In other words we have to prioritize individual maintenance activities nominee (replacement, repair and overhaul). Prioritization concept is based on the simultaneous satisfaction of several different and mutually contradictory objectives: minimum value of the component health index, minimum cost of maintenance activities and the minimum number of component priority risk. The maintenance management problem (i.e. making of optimal admissions list with prioritized maintenance activities) will be solved by optimization techniques which use vector objective function. According to the specific problem of maintenance management optimization we made a program routine.