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PK0-005 Practice Question: A project manager needs to break down the project…
A project manager needs to break down the project scope into smaller, manageable components. Which tool should they use?
⚠ Common exam trap
Candidates often confuse scheduling tools (PERT, Gantt) or role assignment tools (RACI) with scope decomposition, but the WBS is the only tool specifically designed to break down project scope into manageable components.
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
✓
Work breakdown structure (WBS)
The Work Breakdown Structure (WBS) is the correct tool because it decomposes the total project scope into hierarchical, manageable work packages. This aligns with the PMBOK Guide's definition of a WBS as a deliverable-oriented decomposition that facilitates planning, cost estimation, and responsibility assignment. Other tools like PERT or Gantt charts focus on scheduling, not scope decomposition.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
PERT chart
Why it's wrong here
PERT is used for schedule estimation.
- ✗
Gantt chart
Why it's wrong here
Gantt chart shows timeline, not scope decomposition.
- ✗
RACI matrix
Why it's wrong here
RACI defines roles and responsibilities.
- ✓
Work breakdown structure (WBS)
Why this is correct
WBS decomposes scope into manageable components.
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