Which three timeframes are included in MTTR? (Choose three.)

Question

Options

• AThe time to repair the system
• BThe time to diagnose a failure
• CThe time to assess the financial impact
• DThe time to write the failure resolution report
• EThe time to get the service technician onsite

• A
  83% (15)
• B
  11% (2)
• D
  6% (1)

Explanation

MTTR (Mean Time To Repair) measures the total elapsed time from when a failure occurs until the system is restored - making A, B, and E the correct three components. (Note: the question likely has a formatting issue showing only "A"; the full answer is A, B, and E.)

A (repair time) is correct because the actual fix is the core of MTTR. B (diagnosis time) is correct because you can't start repairing until you've identified the root cause - that clock starts at failure detection. E (technician onsite time) is correct because travel/response time is dead time where the system remains down and must be counted.

C is wrong because financial impact assessment is a business/management activity that happens after (or alongside) recovery - it doesn't affect how long it takes to restore the system. D is wrong because writing a post-incident report (RCA/failure report) happens after the system is back up and is not part of the restoration timeline.

Memory tip: Think of MTTR as a stopwatch that starts at failure and stops at full restoration. Ask "does this activity have to happen before the system is back online?" - Diagnose? Yes. Travel to the site? Yes. Repair? Yes. Write a report or count costs? No - the system is already running again.

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