from
The Free On-line Dictionary of Computing (8 July 2008)
Mean Time To Recovery
MTTR
<specification> (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}.
(1998-05-01)