Review of Analysis Methods for Generalized Multi-state Standby Systems Considering Multiple Reliability Enhancement Strategies

Configuring different types of standby components is one of the basic measures to improve system reliability. Furthermore, they are also important strategies to achieve spatial transfer of performance through performance sharing and achieve the transfer of performance between different periods through performance storage. However, existing studies set up reliability enhancement strategies usually for specific systems, and few reliability analysis methods for generalized systems embedded with three reliability enhancement strategies have been formed. In addition, due to the increasing complexity of engineering systems, traditional reliability models based on the theory of binary state cannot accurately characterize the performance of complex systems. Therefore, this paper extracts the implications of three reliability enhancement strategies from the standby types, spatial level, and temporal level. Moreover, a framework of generalized multi-state standby systems considering the coupling of performance sharing and storage is established. Then the related reliability analysis methods from the aspects of the standby types, performance sharing, and storage are reviewed. Finally, conclusions and future research directions for generalized multi-state standby systems are presented.