VYRCO / Maintenance

MTBF, MTTR and availability

Turn operating and repair records into comparable maintenance indicators.

Free · no accountv1.0 · 2026-10-10Private inputs in your browser

MTBF, MTTR and availability

VYRCO · v1.0 · https://vyrco.com/en/tools/maintenance-metrics/

Input data

Numbers: use a decimal point or comma, without thousands separators. Complete fields unless marked optional.

Preparing the tool…

Your inputs are processed here and are not sent to VYRCO. There is no autosave: download your project before closing or switching languages. Opening JSON reads a local file; it does not upload it. CSV includes inputs and results. For PDF, use Print / PDF and select Save as PDF.

How to use it

Choose one repairable asset and a consistent period.
Enter actual operating hours, repaired failures and active repair hours.
Compare periods with the same definitions and review the event count.

Fictional example

Fictional example: 480 operating hours, 4 failures and 12 repair hours give 120 h MTBF, 3 h MTTR and 97.56%.

Method

MTBF = operating hours / failures; MTTR = active repair hours / failures, assuming one repair per failure. Estimated inherent availability = MTBF / (MTBF + MTTR) × 100.

Scope and limitations

The estimate assumes stable conditions and rates; it excludes preventive maintenance and logistics delays. It is not operational availability or a next-failure forecast. Zero failures provide no estimate.