System-of-System Combat Efficiency Evaluation Methods Based on DoDAF-GERT

At present, the configuration of combat system-of-systems (SoS) equipment is highly complex, and the dynamic changes in the states of individual equipment during operations are difficult to predict. Traditional SoS effectiveness evaluation methods are not capable to keep up with these challenges. This study focuses on the OODA (Observation, Orientation, Decision, and Action) operational process, covering different stages such as reconnaissance, intelligence, planning and attacking. First, based on the DoDAF (Department of Defense Architecture Framework), a SoS architecture model is constructed to qualitatively describe the SoS's operational process from multiple perspectives. Second, the ADC (Availability-Dependability-Capability) model is used to calculate the effectiveness of individual equipment. Third, in combination with the Graphical Evaluation and Review Technique (GERT), quantitative calculations are performed to analyze the SoS 's effectiveness. Finally, the contribution of equipment to SoS effectiveness is calculated, as well as the impact of different network architecture in the kill chain on the SoS 's effectiveness, providing guidance for SoS optimization.