GATE | GATE-IT-2004 | Question 72

What is the availability of a software with the following reliability figures?
Mean Time Between Failure (MTBF) = 25 days
Mean Time To Repair (MTTR) = 6 hours

 
(A) 1%
(B) 24%
(C) 99%
(D) 99.009%


Answer: (D)

Explanation: Mean time between failures is not the average time something works then fail. It’s the average time between failures Mean time between failure(MTBF)s= total uptime / number of breakdowns Mean time to repair is the average time taken to repair something. Mean time to repair(MTTR)= total time down/number of breakdowns

Availability = Total uptime/(total uptime+total downtime)
= MTBF/(MTBF+MTTR)*100
= >25*24/(25*24 + 6) * 100
= 99.009 %

Therefore, Answer is D

This solution is contributed by Shashank Shanker khare

//Availability = MTBF/(MTBF+MTTR) * 100= 25*24/(25*24 + 6) * 100 = 99.009 %


Quiz of this Question

My Personal Notes arrow_drop_up
Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.