ITPEC FE Subject A October 2024 Question 44
Source exam: ITPEC FE Subject A October 2024Topic: IT Service Management
ITPEC FE Subject A October 2024 — Question 44 of 60
Total operating time = 24 hours/day × 360 days = 8,640 hours
Average number of failures = total time ÷ MTBF:8,640 ÷ 1,440 = 6
Why not others:
- (a) 3 — would require MTBF of 2,880 hours
- (c) 9 — would require MTBF of 960 hours
- (d) 12 — would require MTBF of 720 hours
Key rule: Number of failures = total operating hours ÷ MTBF.
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