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PK0-005 Practice Question: Which tool shows the hierarchical breakdown of…
Which tool shows the hierarchical breakdown of work to be performed by the project team?
⚠ Common exam trap
Many exam-takers confuse the WBS with a Gantt chart or network diagram because all three are visual project management tools, but only the WBS provides a pure hierarchical decomposition of work without time or dependency information.
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 provides a hierarchical decomposition of the total scope of work to be carried out by the project team. Each descending level represents an increasingly detailed definition of the project deliverables and work packages, making it the definitive tool for breaking down work into manageable components.
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
A Gantt chart shows schedule over time, not a hierarchy of work.
- ✗
RACI matrix
Why it's wrong here
A RACI matrix defines roles and responsibilities, not a breakdown of work.
- ✗
Network diagram
Why it's wrong here
A network diagram shows task dependencies and the critical path, not a hierarchical breakdown.
- ✓
Work Breakdown Structure (WBS)
Why this is correct
A WBS decomposes project work into manageable components.
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Same concept, more angles
1 more way this is tested on PK0-005
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which document breaks down the project deliverables into smaller, more manageable components?
easy- A.Project schedule
- ✓ B.Work breakdown structure
- C.Risk register
- D.Project scope statement
Why B: The Work Breakdown Structure (WBS) is the correct document because it hierarchically decomposes the total scope of work into smaller, more manageable work packages. This decomposition is a core deliverable-oriented grouping that enables accurate cost estimation, resource allocation, and schedule development. The WBS is defined in the PMBOK Guide as a 'deliverable-oriented hierarchical decomposition of the work to be executed by the project team.'
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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