Network MTTR Calculator

Break mean time to repair into detect, dispatch, travel, diagnose and fix phases, and see which phase dominates.

About Network MTTR Calculator

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

Worked example

With the default values below, Network MTTR Calculator returns Mean Time to Repair of 150. Change any input above and every figure here is recalculated in your browser.

Inputs used

Time to detectaccepts 0–10,000 minutes: 8 minutes
Time to engage the right engineeraccepts 0–10,000 minutes: 15 minutes
Travel or remote-access timeaccepts 0–10,000 minutes: 45 minutes
Time to diagnoseaccepts 0–10,000 minutes: 30 minutes
Time to repair or replaceaccepts 0–10,000 minutes: 40 minutes
Time to verify and closeaccepts 0–10,000 minutes: 12 minutes

Results

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

Step by step

1Values used
2Network MTTR
3Mean Time to Repair= 150 minutes
4Mean Time to Repair= 2.50 hours
5Time Before Work Starts= 68 minutes
6Hands-On Repair Time= 82 minutes
7Largest Contributor= Travel or remote access

Assumptions and limits

The result is derived only from the 6 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

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.