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Exam PMI-SP topic 1 question 110 discussion

Actual exam question from PMI's PMI-SP
Question #: 110
Topic #: 1
[All PMI-SP Questions]

You are the project manager of the NHG. The following figure represents your project network diagram.

Management has asked that you add some features to the project scope. Through the change control system these changes are approved and they'll affect
Activity I. The duration of Activity I, which is on the critical path, will decrease by three days. What affect does this have on the critical path?

  • A. The critical path will now take 26 days.
  • B. The critical path will now take 17 days.
  • C. The critical path will now take 23 days.
  • D. The critical path will now take 20 days.
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Suggested Answer: C 🗳️
The critical path is the path in the project network diagram with the longest duration. In project management, a critical path is the sequence of project network activities which add up to the longest overall duration. This determines the shortest time possible to complete the project. Any delay of an activity on the critical path directly impacts the planned project completion date (i.e. there is no float on the critical path). This project actually has two critical paths. Path ACGIJ takes 23 days. Path ACGHJ also takes 23 days. When Activity I decreases by three days the critical will still take 23 days to complete as Path ACGHJ remains a critical path.
Incorrect Answers:
A: The duration of the critical path did not increase.
B: The critical path did not reduce to 17 days.
D: The duration of the path ACGIJ will decrease to 20 days but the critical path will remain at 23 days.
by Miotti at June 5, 2023, 6:50 p.m.

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Miotti
1 year, 4 months ago
If Activity A is on the critical path and its duration is decreased by three days, it will indeed impact the critical path by reducing its duration by three days. If the original critical path duration was 23 days, when Activity A now takes zero days to complete, the critical path will be reduced to 20 days.
upvoted 2 times
ed55bcd
8 months, 4 weeks ago
The question asked that if Activity I is reduced by 3days, not Activity A. The answer is correct.
upvoted 1 times
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