PK0-005 Tools and Documentation Practice Question
A project manager wants to visualize the sequence of project activities and their dependencies to identify the critical path. Which tool should be used?
⚠ Common exam trap
Many exam-takers confuse the Gantt chart (which visually shows a timeline and is the most familiar scheduling tool) with the network diagram, which is the specific tool for dependency sequencing and critical path analysis.
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 (also called a PERT/CPM chart or activity-on-node diagram) is the standard project management tool for visualizing the sequence of activities and their logical dependencies. It explicitly shows predecessor/successor relationships between tasks, which is exactly what is needed to calculate the critical path — the longest sequence of dependent activities that determines the minimum project duration. Gantt charts show duration and schedule but do not inherently display dependency logic in a way that supports critical path calculation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Pareto chart
Why it's wrong here
A Pareto chart ranks causes by frequency to highlight the vital few, using categorical counts rather than activity durations or dependencies, so no critical path emerges. It suits quality or defect prioritisation, not schedule network analysis.
- ✓
Network diagram
Why this is correct
A network diagram maps activities as nodes with arrows showing dependencies, so the longest path through it reveals the critical path. This directly satisfies the need to visualise sequence and dependencies, unlike a Gantt chart that emphasises duration and calendar timing.
- ✗
Milestone chart
Why it's wrong here
A milestone chart plots scheduled milestone dates against a timeline, showing progress checkpoints rather than activity sequencing or dependency links, so the critical path cannot be derived. It suits executive progress reporting, not network-style dependency analysis.
- ✗
Gantt chart
Why it's wrong here
A Gantt chart displays activities as bars against time with dependencies, but it does not compute the critical path; that requires the precedence diagramming method's forward and backward pass. Gantt charts suit schedule communication, not critical-path calculation.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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