Network MTTR Calculator
Break mean time to repair into detect, dispatch, travel, diagnose and fix phases, and see which phase dominates.
Inputs
Mean Time to Repair
150minutes
Mean Time to Repair
2.50hours
Time Before Work Starts
68minutes
Hands-On Repair Time
82minutes
Largest Contributor
Travel or remote access
Step by step
Values used
Time to detect = 8 minutes; Time to engage the right engineer = 15 minutes; Travel or remote-access time = 45 minutes; Time to diagnose = 30 minutes; Time to repair or replace = 40 minutes; Time to verify and close = 12 minutes
Network MTTR
MTTR = detect + dispatch + travel + diagnose + repair + verify.
Mean Time to Repair
= 150 minutes
Mean Time to Repair
= 2.50 hours
Time Before Work Starts
= 68 minutes
Hands-On Repair Time
= 82 minutes
Largest Contributor
= Travel or remote access
How it works
MTTR is not just wrench time. Splitting it into the phases before work starts and the phases of actual repair shows whether the fix is slow or the response is, which are solved by completely different investments. Availability is far more sensitive to MTTR than to MTBF, and detection plus dispatch is usually cheaper to shorten than travel or spares logistics.
Formula
Network MTTR
MTTR = detect + dispatch + travel + diagnose + repair + verify.
- detect
- Time from failure to an alarm someone acts on
- verify
- Service validation before the ticket is closed
Frequently Asked Questions
How is Network MTTR calculated?
MTTR = detect + dispatch + travel + diagnose + repair + verify. MTTR is not just wrench time. Splitting it into the phases before work starts and the phases of actual repair shows whether the fix is slow or the response is, which are solved by completely different investments.
Why does Network MTTR matter?
Availability is far more sensitive to MTTR than to MTBF, and detection plus dispatch is usually cheaper to shorten than travel or spares logistics.
What values do I need to enter?
This calculator takes 6 inputs: Time to detect, Time to engage the right engineer, Travel or remote-access time, Time to diagnose, Time to repair or replace, Time to verify and close. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.
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