Exploring Functional Dependency Network Based Order-Degree Analysis for Resilient System-of-Systems Architecture Design

Dynamic complex environment requires resilient system-of-systems (SoS) architecture that can effectively deal with uncertainty. However, increasing resilience could affect other evaluation metrics, such as cost and effectiveness. To simplify the trade-off analysis process in the early design phase, this paper explores the use of a representative index that directly illustrates a balanced range of effectiveness, cost, and resilience. Specifically, this paper compares the combat SoS to an ecological network and develops a functional dependency network based effectiveness, resilience, and order-degree analysis method. Compared with the previous order-degree research, the proposed combat SoS architecture modeling and calcuation based on fucntional dependency network can reflect the rules of data exchanging more realistically. Based on the application to a notional anti-ship combat SoS, the order-degree is able to reflect the relationship between SoS resilience index and cost-effectiveness index (CEI) in the given scenarios. This implies that the order-degree has a good opportunity to serve as an indicator for supporting balanced resilient SoS design.