Who is responsible for the management of the system-level interfaces?

• A. Contractor
• B. Government
• C. Program Manager
• D. System Engineer

Answer: (B)

System-level interfaces require centralized governance because they span multiple subsystems and vendors, so a single owner must define and approve changes that affect the entire system. The government, as the customer and sponsor, holds the authority to set overall requirements, maintain the interface control process, and approve changes that impact multiple subsystems, ensuring interoperability across the whole program. Contractors implement their parts according to these defined interfaces, while the program manager coordinates activity, and the system engineer designs interfaces within individual subsystems. But when it comes to managing how everything fits together across the entire system, the authority rests with the government.