Solved Example: 9034-01

The mean time to repair (MTTR) for a repairable system is 30 minutes. When maintenance time changes from 20 minutes to 40 minutes, the net increase in maintainability is closest to: (GATE PI 2019)

A. 0.15

B. 0.25

C. 0.45

D. 0.60

Correct Answer: B

Solved Example: 9033-01

A product has MTBF of 200 hours and a MTTR of 10 hours. What is its system availability? (RPSC ME Lecturer 2011)

A. 0.48

B. 0.050

C. 0.952

D. 1.050

Correct Answer: C