Which statement correctly defines MTTR?

Which statement correctly defines MTTR?

• A. It measures the time to restore full business operations after an incident.
• B. It identifies privacy risks for new initiatives.
• C. It is the percentage of computing power needed during a disaster.
• D. It is the average time to repair an asset or component after disruption.

Answer: (D)

MTTR stands for mean time to repair. It is the average duration required to fix a failed asset and bring it back to service after a disruption. This metric shows how quickly maintenance and incident response can restore functionality, typically measured from the moment the failure is detected to when the asset is operational again (often including diagnosis, replacement, testing, and reboot steps). It isn’t about how long it takes to restore full business operations (that would relate to RTO), nor about identifying privacy risks or the amount of computing power needed during a disaster. The statement describing the average time to repair an asset or component after disruption best captures MTTR.