A signal processor software is expected to operate for 91.25 days after repair…
2022
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 software is —
- A.
96.9862%
- B.
97.9862%
- C.
98.9862%
- D.
99.9962%
Attempted by 130 students.
Show answer & explanation
Correct answer: D
Availability is defined as: A = MTBF / (MTBF + MTTR).
Given MTBF = 91.25 days and MTTR = 5 minutes.
Convert MTTR to days: 5 min = 5/(60×24) days = 5/1440 ≈ 0.0034722 days.
Compute availability: A = 91.25 / (91.25 + 0.0034722) ≈ 91.25 / 91.2534722 ≈ 0.99996196.
Convert to percentage: A × 100 ≈ 99.9962%.
So the software availability is about 99.9962%.