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PK0-005 Practice Question: A project manager notices that a task on the…
A project manager notices that a task on the critical path is delayed by 3 days. Which tool should the project manager use to determine the impact on the project completion date?
⚠ Common exam trap
Many candidates confuse a Gantt chart's visual timeline with the ability to analyze critical path impacts, but only a network diagram (or CPM chart) provides the dependency and float data needed to quantify the delay's effect on the project completion date.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Network diagram
The network diagram (specifically the critical path method, CPM) is the correct tool because it visually maps task dependencies and identifies the critical path. A 3-day delay on a critical path task directly extends the project completion date by 3 days, as there is no float. The project manager can use the network diagram to trace the impact through dependent tasks and confirm the new end date.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Gantt chart
Why it's wrong here
Gantt chart shows timeline but does not directly calculate impact on completion date.
- ✓
Network diagram
Why this is correct
Network diagram shows dependencies and critical path; impact can be recalculated using forward/backward pass.
- ✗
Risk register
Why it's wrong here
Risk register tracks risks, not schedule calculations.
- ✗
Work breakdown structure
Why it's wrong here
WBS defines scope, not schedule.
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