Correct Answer - Option 4 : 99.9962%
The correct answer is option 4
DATA:
After repair, the signal processor is expected to operate for 91.25 days
Mean software repair time = 5 minutes
FORMULA:
The percentage of availability of software = (time available for software operation ÷ total time) × 100
Time available for software operation is 91.25 days= 91.25 × 24 × 60 minutes
Total time = 91.25 days + 5minutes =91.25 × 24 × 60 + 5 minutes
Availabity = (91.25 × 24 × 60 ÷ (91.25 × 24 × 6 +5)) × 100
∴ Availabity = 99.996194 ≈ 99.9962%
