Which Employment Tenet refers to maintaining system performance under stress and disruption?

• A. Early Engagement
• B. Resilience
• C. Mutual Support
• D. Defense in Depth

Answer: (B)

Resilience is the tendency that focuses on keeping the system performing under stress and disruption. It means designing for continuity and quick recovery: building redundancy into critical components, enabling graceful degradation so operations don’t collapse when a part fails, and having clear recovery procedures and drills so you can continue mission-critical tasks even during disruptions. In air defense fire control, this translates to keeping radar, data links, and command interfaces operating or able to switch to fallback modes when under attack or during hardware or communication faults, and ensuring operators can quickly restore full capability.

Early engagement is about starting relationships sooner; mutual support emphasizes teamwork and assistance; defense in depth is about layered safeguards. Each supports the mission, but resilience specifically targets sustaining performance through adverse conditions, which is why it’s the best fit for maintaining system performance under stress and disruption.