Difference between MTTR and MTBF

Question

Accepted Answer

MTTR is the average time to repair a failed system while MTBF is the average time between failures.

MTTR measures the maintainability of a system while MTBF measures its reliability.
MTTR is calculated by dividing the total downtime by the number of failures while MTBF is calculated by dividing the total uptime by the number of failures.
MTTR is usually shorter than MTBF as it only measures the time to repair a failed system while MTBF measures the time between failures.
MTTR is an important metric for maintenance engineers as it helps them identify areas for improvement in the maintenance process.
MTBF is an important metric for design engineers as it helps them design more reliable systems.

Accepted Answer

MTBF measures the time between failures for devices that need to be repaired, MTTR is simply the time that it takes to repair those failed devices.

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