ITPEC FE Subject A April 2024 Question 41
ITPEC FE Subject A April 2024 — Question 41 of 60
If activity B increases from 5 to 10 days, check all paths:
| Path | Original | With B=10 |
|---|---|---|
| A→B→F→H | 50 | 55 |
| A→B→E→G→H | 55 | 60 |
| C→D→G→H | 65 | 65 |
The critical path C→D→G→H = 65 is unchanged — no path through B exceeds it.
Why not others:
- (a) EST of G = max(A→B→E, C→D) = max(30, 35) = 35 — unchanged
- (b) LST of F = 65 - 15 - 20 = 30 — unchanged
- (d) Critical path stays at 65 days — no increase
Key rule: Increasing a non-critical activity does not affect project duration as long as its path stays shorter than the critical path.
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