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Know about MTBF & MTTR and their Relation to FMEA

Mathematics have problems, but it has solutions to that as well, right!! Actually every problem has a solution to it - be it big or small - we just need to find out the right path towards solutions.

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Know about MTBF & MTTR and their Relation to FMEA

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  1. Know about MTBF & MTTR and their Relation to FMEA    Mathematics have problems, but it has solutions to that as well, right!! Actually every problem has a solution to it - be it big or small - we just need to find out the right path towards solutions.     Success and failure are the two core parts of our lives in every state. A company experiences both in their field of work; but they know to stand up from the failure as well. And to bring ourselves out of the situations of failure, we first need to analyse and measure our faults. And we will come to know our faults, we can ignore them easily. So, how companies are measuring the failure rate and how effective are those tools - this blog will talk about.    For most us, failure is counted as when a machine or a system is not working properly, or fulfilling the objectives according to industry desires. And in industries, there are certain parameters to measure that rate:    ● MTBF – Mean Time Between Failures  ● MTTR – Mean Time To Repair                                                                                                                                                                                                                                                                                                              Source    Let us first discuss about MTBF and then we will move onto MTTR…   

  2. MTBF  Failure does not come once, and with machines, it can definitely happen a lot of time because though we are running them, we cannot control the internal defects. And to make ourselves a bit more aware of the time they can take place, we have adapted the measure of MTBF. It actually calculates the average occurrence time between one failure and the other, thus helping us to get an overview of when it can happen again so that we can avoid them if possible.  Look at the formula of calculating MTBF:                                                                                                                                                                Source    Total Uptime = For the time span a particular system or machine is running.  Number of Failures = The number of failures taken place within this period.    And this method also helps us to know the failure rate per hour with a formula of:      Source    By diving 1 by the result of MTBF, we can easily calculate the failure rate.    This process actually assists us in predicting the performance of a machine and how many failures it can do in an hour. In result, prevention can be taken accordingly as well.    MTTR  Now moving onto the next measure of MTTR, as we discussed while talking about MTBF that we cannot control the internal defects of a machine - it is true; but we can definitely repair that defect. It may take time, but it can definitely get repaired.                                                                                                                             

  3.   So, MTTR is actually the preventive measure we talked about while explaining MTBF. This lets us calculate the average time taken for the repairing of that particular machine after the failure.  Here is the formula:                                                              Source        Total Downtime = For the time span a particular system or machine has stopped working.  Number of Failures = The number of failures taken place within the total uptime.    By analyzing the average repairing time, we can pick the time according to our convenience.  Both these tools are helping industries to increase the productivity and decrease losses effectively. It indicates the performance of an industry – how well it is working, with which we can improve the quality of work.    An increased result of MTBF and on the other hand, a decreasing rate of MTTR will mean that the company is performing well, which will heighten customer reliability towards the company and its products or services.    There is a core relation between these two tools of failure measurement and FMEA (Failure Mode and Effects Analysis). As the name implies, failure modes actually detect why the process has failed and effects are the outcome that the company may face for this.                                                                                                                                                                                                                                                             

  4.   Source          When we come to know the failure rate and the average repairing time, the reasons also need to get analyzed. This is done by FMEA. By identifying the defects within the process, companies can easily avoid them, as we were saying in the entire blog. There is no other better way to detect the reason of the failures and to correct them than FMEA.    And obviously, when we know the reasons and the time of failures, we can smoothly get out of that. Thus we can keep up the quality of our company.    For better understanding and explanation, here is an example:  When a bucket manufacturing company has detected the failure rate of the manufacturing machine, it will start analyzing why these failures are taking place – is the machine being unable to work after a certain period of time or the reason is something else!! And after that, the average repairing time will be calculated. All these will help to reduce the failure and become more productive.    MTBF and MTTR are core planning tools which tell us exactly when a particular equipment or  component needs to be repaired. We need to add something on that too.                                                                                                                                                                                                                                         

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