What is the availability of the software with following reliability figures.
Mean Time Between Failures (MTBF) is 20 days
Mean Time To Repair (MTTR) is 20 hours
(A) 90%
(B) 96%
(C) 24%
(D) 50%
Answer: (B)
Explanation: Convert into the same unit then apply the formula.
Software availability,
= MTBF / (MTBF + MTTR)
= 20*24 / (20*24 + 20)
= 480 / 500
= 0.96
= 96 %
Option (D) is correct.
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Last Updated :
27 Nov, 2020
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