Competition, it’s a contest between individuals or organizations that do the same job to get better results. Companies are continually improving and developing their processes so they can be in this contest. One of these processes is maintenance management and has a direct impact on the product cost. Using efficiently the maintenance management process, a better cost of the product will be reflected and good quality product will be achieved at the time to the customer. In this paper, the factors affecting maintenance costs in companies and the type of maintenance management that could be applied to reduce these costs were studied. In this area, in particular the management of spare parts (quantity of safety stock, stock rotation speed, etc.) and the maintenance strategy (planned and maintenance maintenance) adapted to the equipment were examined.