Optimal maintenance decisions for gamma deteriorating systems |
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| Authors: | Lin Tan Chiming Guo Zhijun Cheng Bo Guo |
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| Institution: | 1. Department of Human Sciences, College of Humanities and Social Sciences, National University of Defense Technology,Changsha 410074, P. R. China
2. Department of Systems Engineering, College of Information System and Management, National University of Defense Technology, Changsha 410073, P. R. China |
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| Abstract: | An optimal replacement model for gamma deteriorating systems is studied.This methodology uses a gamma distribution to model the material degradation,and the impact of imperfect maintenance actions on the system reliability is investigated.The state of a degrading system immediately after the imperfect maintenance action is assumed as a random variable and the maintenance time follows a geometric process.A maintenance policy (N) is applied by which the system will be repaired whenever it experiences Nth preventive maintenance (PM),and an optimal policy (N*) could be determined numerically or analytically for minimizing the long-run average cost per unit time.Finally,a numerical example is presented to demonstrate the use of this policy. |
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| Keywords: | maintenance policy gamma process geometrical process deteriorating system imperfect maintenance |
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