WinningKPI - Manufacturing - KPI for Measuring of Mean-time between failure (MTBF) posted in category Manufacturing KPI details: This indicator is for measuring the quality of a system, by calculating the average time between equipment failures over a given time frame. This KPI can be calculated per single item or group of similar equipment.
For instance, a company may want to calculate the MTBF of a printing machine, or the MTBF of 10 printing machines.
For a single item the time period is divided by the number of failures, and for multiple items the number of items is multiplied by the time period and divided by the total number of hours.
Formula:
Single Item: time period/ number of failures
Multiple Items: number of items x time period/ total number of failures
For instance, for one printer, in a 12 months period, where the printer failed 5 times the MTBF is:
12/5 = 2.4 months MTBF
For 10 printers, in a 12 months period, where the total number of failures is 60:
10 x 12/ 60 = 1200/60 = 2 months MTBF
KPI Unit: time
KPI Time Frame: update quarterly or yearly
Posted by Oana Boteanu | Help to protect community: Flag for moderation
Ideas suggested by WinningKPI community:Here are comments:
This KPI, as mentioned above, is used to measure the quality of a system.
In the example given above, the printers have a MTBF of 2-2.4 months. That is a high (low- but high cost) as the company will aim to achieve a healthy MTBF of 12 months, 24 moths etc.
Using the MTBF KPI fully brings its benefits if maintenance practices are taken into consideration and amended, if in need.
For the example above with the printers, the manager may choose to asses the reason for the failures.
This will start by identifying the type of failure, any failures that are repeated etc.
Subsequently, the manager should make the necessary changes, such as repairing and replacing the printers etc., and then measure the MTBF.
An analysis should be carried out to find out whether the improvements have improved the MTBF rate.
The renovations may be pricy, but if the MTBF rises form 2 months to 12-24 months, that will return the costs in no time.
Oana Boteanu | + | September 13, 2012 at 9:58 am
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