System reliability s increased by:

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:
One prefers to have a higher MTBF and a lower MTTR. “Each device has a mean time between
failure (MTBF) and a mean time to repair (MTTR). The MTBF estimate is used to determine the
expected lifetime of a device or when an element within that device is expected to give out. The
MTTR value is used to estimate the time it will take to repair the device and get it back into
production.” Pg 267 Shon Harris: All-in-One CISSP Certification