Mean time to repair (MTTR)

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Mean time to repair (MTTR) is the average of, downtimes of a particular machine, for a particular time period. In other words, it is the average of times required to recover from its failures, for a particular time period.

MTTR and MTBF are closely related. You may read our article on MTBF.

How to calculate MTTR

MTTR is calculated by following formula,

Total downtime is the sum of all downtime of the machine for a particular period and no of Failures is the total no of breakdowns of the machine for a particular time period.

Sample calculation

Following is the data for a machine and we are going to calculate MTTR for a month.

MTTR = 1356 / 8

= 169.5 minutes

We are done with the calculations.

What information caw we extract from MTTR

MTTR points out how quickly can a machine can be recovered from its failure. Better to always have lower MTTR.

Also, we can also compare the MTTR of machine with previous periods and judge the improvement in reduction in downtime.

I hope you got some knowledge regarding MTTR.

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