Which metric is commonly used to gauge the effectiveness of a TA program in detecting and responding to incidents?

• A. Attestation success rate
• B. Time to containment
• C. False positive rate
• D. Team headcount

Answer: (A)

The key measure is how fast you can contain an incident after it’s detected. This captures the effectiveness of both detection and response: a shorter time to containment means you’ve identified the issue quickly and acted swiftly to stop its spread, reducing damage, data loss, and business disruption. It’s a practical, outcome-focused metric that teams use to gauge how efficiently their TA program detects, triages, escalates, and neutralizes threats.

Attestation success rate, while relevant to compliance and verification processes, doesn’t directly reflect incident handling or how quickly threats are contained. False positive rate matters because many alerts you chase can slow response, but it’s still about alert quality rather than the speed of containment itself. Team headcount is a resource metric and doesn’t measure how effectively incidents are detected or contained. So the measure that best reflects the program’s effectiveness in detecting and responding is the time to containment.