A preventive maintenance policy for a continuously monitored system with correlated wear indicators

作者：Mercier Sophie^*; Hai Ha Pham

来源：European Journal of Operational Research, 2012, 222(2): 263-272.

DOI：10.1016/j.ejor.2012.05.011

• Reliability
• Multivariate Levy processes
• Dependent wear indicators
• Gamma processes
• Optimal replacement
• Renewal theory

A continuously monitored system is considered, that gradually and stochastically deteriorates according to a bivariate non-decreasing Levy process. The system is considered as failed as soon as its bivariate deterioration level enters a failure zone, assumed to be an upper set. A preventive maintenance policy is proposed, which involves a delayed replacement, triggered by the reaching of some preventive zone for the system deterioration level. The preventive maintenance policy is assessed through a cost function on an infinite horizon time. The cost function is provided in full form, and tools are provided for its numerical computation. The influence of different parameters on the cost function is studied, both from a theoretical and/or numerical point of view.

• 出版日期2012-10-16