The estimate lifetime of a device or the estimated timeframe until a component within a device gives out is called:
A.
UPS
B.
MTTB
C.
MTTR
D.
MTBF
Explanation:
Mean time before failure (MTBF) is used to prepare for hardware
failures and the expected cost of replacing it. The mean time to repair (MTTR) is
the time needed to get the device fixed and back into production.