Which of the following increases system reliability?

A.
A lower MTBF and a lower MTTR

B.
A higher MTBF and a lower MTTR

C.
A lower MTBF and a higher MTTR

D.
A higher MTBF and a higher MTTR

Explanation:
Mean-time-between-failures (MTBF) is the average length of time the
hardware is functional without failure. Mean-time-to-repair (MTTR) is the amount of
time it takes to repair and resume normal operation after a failure has occurred.
Having a higher MTBF and a lower MTTR will increase equipments reliability, thus
increasing the systems overall reliability.