A signal processor software is expected to operate for 91.25 days after…
2017
A signal processor software is expected to operate for 91.25 days after repair, and the mean software repair time is expected to be 5 minutes. Then, the availability of the software is :
- A.
96.9862%
- B.
97.9862%
- C.
98.9962%
- D.
99.9962%
Attempted by 67 students.
Show answer & explanation
Correct answer: D
Solution:
Given mean time between failures (MTBF) = 91.25 days. Convert days to minutes: 91.25 × 24 × 60 = 131,400 minutes.
Given mean time to repair (MTTR) = 5 minutes.
Availability formula: A = MTBF / (MTBF + MTTR)
Substitute values: A = 131,400 / (131,400 + 5) = 131,400 / 131,405 ≈ 0.99996197.
Convert to percentage: 0.99996197 × 100 ≈ 99.9962%
Therefore, the availability is approximately 99.9962%.