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MTTR, also referred to as maintainability, measures the ability of a maintenance organization to restore equipment that has failed to a serviceable condition. Using MTTR, you can determine the average time it takes your maintenance staff to prepare, mobilize, and repair a machine that has failed and then get it back into service. MTTR is calculated as follows:

You can use this metric to find your site’s current MTTR. If your current average repair time is unacceptable, you may need to look for ways to expedite the machine’s restoration time. Reducing your MTTR can help decrease production losses resulting from maintenance downtime.