MTTR - Mean Time to Repair

MTTR, or Mean Time to Repair, is a key indicator that measures the average time it takes to repair a piece of equipment or machine after a breakdown. Regular monitoring of this parameter allows companies to minimise downtime, increase production efficiency and reduce operating costs. In this article you will learn:

• What exactly is the MTTR indicator,
• How to calculate MTTR step by step,
• why it is worth monitoring this indicator,
• How to improve the MTTR value of your business.

What is the MTTR?

MTTR (Mean Time to Repair) is the average time that elapses from the time a failure or breakdown occurs until the equipment, machine or system is fully restored to full operational capability. It is one of the key maintenance performance indicators to assess the effectiveness of repair and maintenance activities.

Why monitor the MTTR?

Regular monitoring of the MTTR indicator allows the company to:

• rapid identification of problems in repair processes,
• minimising costs associated with production downtime,
• increasing the availability and efficiency of machinery and equipment,
• improving the quality of maintenance management,
• increasing the competitiveness of the company.

How to calculate MTTR - step by step

The MTTR calculation is straightforward and consists of several steps:

1. Identify repair times

Make a note of the exact time from failure to full recovery. This includes the time taken to locate the problem, diagnose, repair and restart.

2. Add up the times of all repairs

Add together the times of all repairs carried out over the selected period (e.g. month, quarter).

3. Determine the number of failures

Determine how many failures occurred during the time period analysed.

4. Calculate MTTR

Divide the sum of repair times by the number of breakdowns. The result is the average repair time, or MTTR.

Example of MTTR calculation:

If there were 10 breakdowns in a month and the total time taken to repair them was 40 hours, then: MTTR = 40 hours ÷ 10 breakdowns = 4 hours In this case, the average repair time is 4 hours.

Interpretation of MTTR results

• Low MTTR(short repair time) means that the company responds quickly to technical problems. This minimises production downtime, resulting in better productivity, lower operating costs and greater competitiveness.
• High MTTR(long repair times) indicates the need to analyse maintenance processes and implement measures to improve repair efficiency. It can also be a signal of the need for better planning of inspections and maintenance.

How to improve your company's MTTR?

There are several proven ways to reduce repair times and improve MTTR:

• regular technical training of service and maintenance personnel,
• optimisation of diagnostic and repair processes,
• implementation of machine condition monitoring systems (predictive maintenance),
• maintaining an adequate stock of spare parts,
• implementation of service standards and procedures,
• regular preventive maintenance and servicing of machines.

Summary - why is it important to control MTTR?

Controlling and optimising the MTTR is a key element of effective maintenance management. By regularly monitoring this parameter, a company can quickly identify problems, minimise downtime, reduce operating costs and increase production efficiency. Ensure that your company's MTTR is analysed regularly and take effective corrective action - the best way to improve your company's competitiveness and profitability.

Do you need expert support?

If you need support in optimising your maintenance processes or want to learn more about tools for monitoring technical indicators, contact our experts today!