Mean Time To Recovery

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Mean Time To Recovery

(MTTR) The average time that a device will take to recover from a non-terminal failure. Examples of such devices range from self-resetting fuses (where the MTTR would be very short, probably seconds), up to whole systems which have to be replaced.

The MTTR would usually be part of a maintenance contract, where the user would pay more for a system whose MTTR was 24 hours, than for one of, say, 7 days. This means the supplier is guaranteeing to have the system up and running again within 24 hours (or 7 days) of being notified of the failure.

Some devices have a MTTR of zero, which means that they have redundant components which can take over the instant the primary one fails, see RAID for example.

See also Mean Time Between Failures.
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References in periodicals archive ?
The mean time to recovery of vibrissae orientation in untreated animals was 12.6 d, and this was significantly reduced by ES (F(4, 32) = 20.53, p < 0.05; Figure 2).
Among electrically stimulated animals, mean time to recovery was 16.0 d (~22% reduction).