What is MTBF and MTTR?
What is MTBF?
Mean of MTBF
“MTBF” is mean time between failures.
Simply put, the average of the operating time until the system breaks down.
It’s that divide the operating time until the system breaks down by the number of operations.
Calculation method
MTBF = the operating time until the system breaks down / the number of operations
Example
In the above example, you can use the following calculation.
MTBF = (15h + 30h + 60h + 20h) / 4 times
= 31.25
What is MTTR?
Mean of MTTR
“MTTR” is Mean Time To Repair.
Simply put, the average of times from failure to recovery.
It’s that divide times from failure to recovery by the number of failures.
Calculation method
MTTR = times from failure to recovery / the number of failures
Example
In the above example, you can use the following calculation.
MTBF = (20h + 5h + 20h) / 3 times
= 15
