Importance Measure of Equipment Task Based on Operational Dependency of SoS

In order to evaluate the mission success of system of systems (SoS) and to develop maintenance strategies to meet mission requirements of SoS, an importance measure method of equipment task based on operational dependency of SoS is proposed. The operational dependency network of SoS is constructed based on FDNA, and the nodes and dependency relationships in the network are determined. According to the Markov process, the reliability model of a system function is constructed, and the operability level and probability of each node in the network are obtained. Meanwhile, the algorithm of Birnbaum importance measure is introduced to effectively quantify the impact of operational dependency on the task importance of each equipment system in SoS. Finally, the feasibility and effectiveness of this method is verified by a case study.

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