MTTR is the mean or the average time that is required to repair a system or an application
Step-by-step explanation:
This is of the basic assets of the performance metrics and there are also many other performance metrics like the MTBF, MTTF, MTTD
MTTF is the mean time to repair that is the time that is involved to repair the damaged products or the systems or the applications and it is also an important maintenance metric and the time taken also includes the time that is required to diagnose the failure and the problem to repair it