What is MTBF (Mean Time Between Failure)?

MTBF Calculation:

How can I improve my MTBF?

Benefits of MTBF:

What is MTTR (Mean Time To Repair)?

MTTR Calculation:

Why MTTR is important?

How can I improve my MTTR?

Benefits of MTTR:

→ It indicates the expected time between two failures for a repairable machine or system.→ MTBF=[(Total working time) - (Total Breakdown time)] / (No of Breakdowns)or = (Total uptime) / (number of breakdowns)→ It is very important forimplementation which is one of the most popular→ Three similar_machines starting to function properly at 0 hours are working until all of them fail.→ The first_machine failed at 120 hours, the second failed at 140 hours and the third failed at 150 hours.→ The MTBF=(Total uptime) / (number of breakdowns)= [(120+140+150)]/3= 136.667 hours.→ The MTBF is the average of the three failures, which is 136.667 hrs.→ It can be calculated as the arithmetic mean between the failures of equipment.→ In other words, It is the average duration between the failure of equipment.→ This value 136.667 means that a failure in the system occurs every 136.667 hours and it generates losses to the company.→ The opportunity is to increase the duration between two breakdowns.→ In other words, the MTBF is the timing from one failure to another for repairable equipment.→ We can improve it by regular maintenance of machines.→ By implementing smallfor the equipment.→ Make an equipment breakdown history book and take a strong preventing action on it so this breakdown will not repeat in the future.→ It is a basic indicator to predict the reliability of a machine.→ If the_MTBF has increased after a preventive maintenance activity then this indicates a clear improvement in the quality of your processes→ It is very useful for implementingculture in the factory.→ The_MTBF increase will show that your maintenance or verification methods are going good.→ It should be used to elaborate on the company’s knowledge about processes.→ It reduces losses in productivity and also improves the quality of the product.→ It is the average time required to analyze and solve the problem and it tells us how well an organization can respond to machine failure and repair it.→ In other words, failed equipment returns to normal operating conditions or the mean timing duration between the equipment failure and returns to operation.→ It is a basic technical indicator related to the maintainability of the machine and repairable parts.→ It represents the average duration required to repair a failed component.→ In other words, how long the machine is out of production.→ This includes notification timing, analysis timing, fixing timing, waiting, reassembly timing, alignment timing, calibration timing, testing timing, etc.→ The formula of MTTR=Total maintenance time/number of repairs→ It is also called as the meantime to recovery.→ A machine should operate correctly for 20 hours. During this period, 6 failures occurred. The sum of all failure duration is 90 minutes.→ The MTTR = Total maintenance time/number of repairs= 90 / 6= 15 minutes→ It has a remarkable effect on the organization’s profit.→ Long_MTTR means loss of productivity and sometimes, an organization can miss an order or it can impact business relationships.→ To reduce the impact of MTTR, organizations should have their own maintenance teams and hold critical spare parts onsite or run parallel production lines.→ We can improve it by Team Work.→ Implement and follow the troubleshooting manual concept or breakdown history concept→ By provide training on quick repair and motivate people→ Follow the standardized operation procedure.→ Keep the critical spare in stock→ It indicates the efficiency and productivity of the equipment and it has reduced after the preventative maintenance of the machine.→ By reducing Mean Time To Repair we can improve the efficiency and productivity of the machine.→ Lower_MTTR indicates that your company has an immediate action plan to overcome failure.→ It should be used to elaborate on the company’s knowledge about how strong the action plan against the machine failure.→ It reduces losses and also improves productivity and→ It is very useful for implementing Lean Manufacturing culture in the factory.