ITPEC FE Morning October 2021 Question 54
ITPEC FE Morning October 2021 — Question 54 of 80
Network paths (arrow diagram):
| Path | Activities | Duration |
|---|---|---|
| A → D → E → H | 3 + 6 + 6 + 1 | 16 |
| A → D → dummy → G → H | 3 + 6 + 0 + 5 + 1 | 15 |
| B → C → E → H | 4 + 5 + 6 + 1 | 16 |
| B → C → dummy → G → H | 4 + 5 + 0 + 5 + 1 | 15 |
| B → F → G → H | 4 + 7 + 5 + 1 | 17 |
Critical path = B → F → G → H = 17 days
Extending C by 3 days (C = 5 → 8):
- •B → C → E → H = 4 + 8 + 6 + 1 = 19 (new critical path)
- •B → F → G → H = 17 (old critical path, unchanged)
Project duration: 17 → 19 = +2 days.
Why not others:
- (a) not affected — would be true only if C's total float ≥ 3 days (float is actually 1 day)
- (b) extended by 1 day — would be true if C were extended by 2 days only
- (d) extended by 3 days — would be true if C had zero float (already on critical path)
Key rule: Extension impact = increase − total float. Here: 3 − 1 = 2 days added to project duration.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.