Mean Time To Repair (MTTR) is the average time from a failure until the machine is running again. It measures how well maintenance responds.
Time spent restoring equipment
Consistent counting rules
Mean Time To Repair (MTTR) is the average time from a failure until the machine is running again. It measures how well maintenance responds.
MTTR is total repair time divided by the number of failures. Lower means faster recovery.
Reducing MTTR usually depends less on repair skill than on preparation. The time spent diagnosing, locating a spare and reaching the right person often exceeds the actual repair.
That is why it helps to measure repair not as one block but split into detection, diagnosis, parts, repair and verification. Which segment is long tells you what to improve.
Measuring from the moment of failure gives a very different number than from the moment maintenance was notified. Starting at failure includes detection delay and is closer to actual loss. Either way, fix the definition so comparisons hold.
Terms that make more sense read together.
Mean Time Between Failures (MTBF) is the average running time between one failure and the ne…
MetricsOverall Equipment Effectiveness (OEE) expresses how much of its planned time a machine actua…
MetricsPreventive maintenance inspects and replaces on a defined interval or condition threshold, b…
What IYULAB provides in this area.
Questions that come up when evaluating MTTR.
By recording repair time in segments. Without knowing where the time goes you cannot choose what to improve.
Weigh failure frequency, lead time and the cost of downtime together. A rarely used part with a long lead time and high stoppage cost is still a candidate to stock.
It preserves the record but makes aggregation and analysis hard. Segment times and parts used need to be discrete fields for MTTR to be decomposed.
A look at your equipment and current workflow is usually enough to scope it.
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