International Journal of Industrial Engineering & Production Management

  One kind of mid-term production system, aggregate production planning, identifies the optimum production plan for each production period. The goal of aggregate production planning is to forecast future demand swings. On the other hand, maintenance system identifies the proper time for preventive maintenance and restrains from break downs and reduces maintenance costs. Due to the importance of these two systems, in recent years, there has generated different models independently. The current research has proposed an integrated aggregate production planning model considering the time and costs of maintenance. This model indicates the optimum production size among the optimum time of preventive maintenance. As a final point, in order to check the reliability of the proposed model, an example has been examined. Results show that a considerable amount of cost has been saved by applying the model .