The mean time to repair (MTTR) for a repairable system is 30 minutes
Q. 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
| (A) 0.15 | (B) 0.25 | (C) 0.45 | (D) 0.60 |
Ans: 0.25
Sol:
