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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