Once a device has failed, what metric measures the average amount of time to repair?

a.

mean field replacement time (MFRT)

b.

mean time to repair (MTTR)

c.

mean time to restore (MTTR)

d.

mean restoration time (MRT)

Answer:b) Mean time to repair (MTTR)

Explanation: - Mean time to repair (MTTR) is the average time that is defined for the repairing of the of any failure or damage that has occurred. Mean time to repair gives idea about the maintenance of the elements that can be repaired. It holds the responsibility of the reverting about the repair speed of the item. Therefore, the correct option is option (b).