A Reliability Modeling Method for Directed Acyclic Graph Network System Including Backup Bypass

A mission reliability modeling method is proposed for directed acyclic graph network system including backup bypass. By decomposing it into sub directed acyclic graphs along all connected and disconnected path direction until it is decomposed into device units, and mixing the sub directed acyclic graphs adjacent to each node in series, parallel, and bypass models, a mission reliability block diagram model of the network system is constructed in which the sub networks and devices are mixed layer by layer, and the discrete event simulation method is used for calculation, which can effectively solve the mission reliability modeling and calculation problem of such network system in engineering.