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Preventive maintenance optimization model based on the availability economical restriction

Author(s): Li Guo, Zhi-Jie Song, Zhi-Xiu Yang, Yu-zhong Zhao

To reduce maintenance cost and improve the efficiency of the equipment for enterprise, the theory of modern equipment maintenance is adopted. By considering the dynamic nature of preventive maintenance cost and the age reduction factor, a preventive maintenance decision-making model is established. Unit time minimum cost is regarded as the optimization goal and the availability is regarded as the constraint in the preventive update cycle of the model. Numerical example is given, and the enumeration approach and software simulation is proposed to get preventive maintenance cycle and cost under the different times of the preventive maintenance. The result shows that when equipment preventive maintenance cycle narrows gradually, maintenance cost decreases at first and increases later, and when the cost reaches the minimum, the availability reaches the maximum

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