Imperfect repair model for complex repairable system - a literature survey with discussion

Complex repairable system models address the dynamics of the failure and repair process. These models are critical to the maintenance optimization. This paper firstly discusses different repair effectiveness. Imperfect repair is considered as the most frequently occurred repair effectiveness. Later on this paper surveys the developed imperfect repair models in state of art. It reveals current models are more complex and they are more general. Some of them can generalize other models. However, in general, the implementation of most models are not readily, as evaluating unknown parameters, and predicting number of failures are difficult.