hardMultiple Choice
PK0-005 Practice Question: A project manager is using a Gantt chart to track…
A project manager is using a Gantt chart to track progress. Which tool would BEST complement the Gantt chart to show task dependencies and the critical path?
⚠ Common exam trap
Watch out — candidates often confuse the Work Breakdown Structure (WBS) with a schedule tool, mistakenly thinking it shows task order, when in fact the WBS is a deliverable-oriented decomposition and does not represent dependencies or the critical path.
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
A network diagram (e.g., activity-on-node or PERT chart) is the best complement to a Gantt chart because it explicitly maps task dependencies (finish-to-start, start-to-start, etc.) and calculates the critical path using forward and backward pass methods. While a Gantt chart shows progress over time, it does not inherently display the logical relationships between tasks or the float/slack values needed to identify the critical path.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Network diagram
Why this is correct
A network diagram maps tasks as nodes with arrows showing dependencies, making the critical path explicit — the longest dependent sequence. A Gantt chart shows duration and timing but obscures dependency logic, so pairing them satisfies the stem's need to reveal dependencies and the critical path.
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Change log
Why it's wrong here
A change log records approved changes to scope, schedule and baselines; it holds no dependency or float data, so it cannot reveal the critical path. It is tempting because change control underpins schedule integrity, and a change log would be the right artefact when tracking how approved modifications affect an existing baseline.
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Work breakdown structure
Why it's wrong here
A work breakdown structure decomposes deliverables into work packages; it shows hierarchical scope, not logical task sequencing, durations or float, so no critical path emerges. It is tempting because the WBS underpins scheduling, and it would be the correct choice when the goal is defining and organising the full scope of deliverables.
- ✗
Risk register
Why it's wrong here
A risk register logs identified risks with probability, impact, owners and responses; it contains no task sequencing or duration data, so it cannot compute a critical path. It is tempting because schedule risk analysis draws on it, and it would be correct when the objective is documenting and tracking threats to project objectives.
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