PK0-005 Project Life Cycle Practice Question
A project manager is decomposing the project scope into smaller components. Which output is produced?
⚠ Common exam trap
PK0-005 often tests the confusion between scope-decomposition outputs and adjacent artifacts — candidates pick 'scope statement' because it sounds scope-related, missing that the scope statement is an input to Create WBS, not the output produced by decomposition.
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)
Decomposing project scope into smaller, manageable components is the definition of creating a Work Breakdown Structure (WBS). The WBS is a deliverable-oriented hierarchical decomposition of the total scope of work, and it is the primary output of the Create WBS process in PMBOK.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Risk breakdown structure
Why it's wrong here
A risk breakdown structure hierarchically organises identified risks by category, not project scope; scope decomposition produces the WBS. It is tempting because both are hierarchical decomposition diagrams, but the RBS is the correct output when the activity being performed is risk identification and categorisation.
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Scope statement
Why it's wrong here
The scope statement documents product scope, deliverables, assumptions and acceptance criteria; it is an input to decomposition, not its output. It is tempting because it describes scope, but decomposition of scope produces the WBS, with the scope statement already approved beforehand.
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Network diagram
Why it's wrong here
A network diagram sequences activities and shows dependencies for scheduling; it does not decompose scope. It is tempting because both are project management diagrams, but the network diagram is produced during schedule development from the activity list, whereas scope decomposition yields the WBS.
- ✓
Work Breakdown Structure (WBS)
Why this is correct
Decomposing scope produces the Work Breakdown Structure, a hierarchical deliverable-oriented decomposition of total project scope. The WBS defines all work required, with lower levels representing progressively finer detail, satisfying the scope-decomposition input. It is not a schedule or activity list; those derive later from the WBS during sequencing and estimation.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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