Source: https://uptimeify.io/resources/platform-and-support/glossary/mtbf

# MTBF (Mean Time Between Failures)

> MTBF (Mean Time Between Failures) is the average time a service runs correctly between one failure and the next.

MTBF measures how often failures happen: a higher MTBF means longer stretches of healthy operation. It is the frequency counterpart to [MTTR](/resources/platform-and-support/glossary/mttr), which measures how quickly you recover.

Tracking both over time shows whether reliability work is paying off: are outages getting rarer (MTBF up) and shorter (MTTR down)?