Mean time between failures (MTBF) and mean time to repair (MTTR) are two very important indicators when it comes to availability of an. The MTTR formula computes the average time required to repair failed equipment and return it to normal operations. Learn how to calculate it with Fiix. 1, MTBF and MTTR Calculator. 2. 3, Month, February, 4, Name of Machine, M_3. 5, Operation availability (min/mo), 24, 6. 7, Frequence, 8. 9, MTBF.

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Yes, you include the “total population” of your pumps.

In 6 years he had written 2 reports totalling 3 pages and no improvements but he had attaboys and pull or draft as the case may be. Retrieved 7 July We can get to the uptime of a system, for instance, using these 2 KPIs.

For example, in a refinery where I was the Machinery Engineer, we had around pumps of one sort or another. In many situations a unit or system can be repaired immediately after breakown. Block When you block mttg person, they can no longer invite you to a private message or post to your profile wall. There is another method which was baptized “exponential smoothing” that automatically attributes less weight to older data, never “forgetting” any data, regardless of how old they might be.

Originally posted by cheddar-caveman: How long the system should work: Then, when considering series of components, failure of any component leads to the failure of the kttr system, so assuming that failure probabilities are small, which is usually the case probability of the failure of the whole system within a given interval can be approximated as a sum of failure probabilities of the components.


From the availability of the environment managed it is possible to measure the average time between failures and the average time for repair.

Mean time to repair MTTR is the average time required to troubleshoot and repair failed equipment and return it to normal operating conditions.

The MTBF of the resulting two-component network with repairable components can be computed according to the following formulae, assuming that the MTBF of both individual components is known: But if you are confined to reporting past events, then, cells D33 and E33 are the only ones to be considered. Here you have 26 TTF collected over time it doesn’t matter for how long.

Caocul the same time I introduced a vibration monitoring programme along with lube oil analysis and thermography.

MTTR Formula | Mean Time To Repair Calculation | Fiix

What is mean time to repair? One more question, did you track the mtbf of the pump components individually such as bearings, seals, impellers, etc? This leaves out the running time before the first failure and final failure from the caculation.

Fundamentals of Electronic Systems Design. To go back to my question, what would be your calculated mtbf for the Rui’s example above? For complex, repairable systems, failures are considered to be those out of design conditions which place the system out of service and into a state for repair.

From Wikipedia, the free encyclopedia.

Mean time between failures

Rui, Ok, your explanation is clearer this time above. Empower your maintenance team Leverage the cloud to work together, better in the new connected age of maintenance and asset management. I then analysed the failures and started by addressing the biggest problem, the coulpings, then the next, the sealing and so on. By referring to the figure above, the MTBF of a component is the sum of the lengths of the operational periods divided by the number of observed failures:.


Management doesn’t pay attention at such a high degree of detail. MTTR will trend upwards prompting the repair versus replace decision. Calcuo was an old refinery, aroundand their failure rate was horrific, with an MTBF of around 6 months. To take this discussion to the extreme, if ALL your equipment was only ever on stand-by, your MTBF would be “infinity”, they’d never fail! Of course, running calul is better if available.

Of course, you can do at failure mode level the same as you do at equipment level. As developers of OpMona solution for monitoring IT infrastructure and business processes, we always indicate it mttr customers want to measure this type of indicator besides, of course, all its technology park.

When I arrived at the refinery I realised that they had a reliability problem, particularly with the pumps. Do you know which English references discuss this matter at length?