Mission reliability driven Risk-based maintenance approach of multi-state intelligent manufacturing system

Risk-based thinking can better characterize and quantify the defects in the operational process of the manufacturing system, so the probability and loss of defects can be reduced by considering maintenance from the perspective of risk. However, current studies about risk-based maintenance (RBM) for manufacturing systems are rare. Therefore, a risk modeling and maintenance method based on multi-state intelligent manufacturing system is proposed. First, a new definition of operational risk of manufacturing system is proposed by extending the conception of the mission reliability of manufacturing system, and the connotation of RBM is explained. Second, a manufacturing system operational risk model is built based on mission reliability. Third, a RBM framework is proposed to determine the priority of machine maintenance by evaluating the risk level of the machine. Finally, an example is given to illustrate the effectiveness of the proposed method.