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PK0-005 Practice Question: The project manager is reviewing the work…
The project manager is reviewing the work breakdown structure (WBS) with the team to ensure that all deliverables are included. Which rule states that the WBS should capture 100% of the work defined by the project scope?
⚠ Common exam trap
PK0-005 often tests the confusion between the 100% rule and other WBS concepts like decomposition or rolling wave planning, tempting candidates to choose a technique rather than the specific completeness rule.
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
✓
100% rule
The 100% rule in project management states that the work breakdown structure (WBS) must capture 100% of the work defined by the project scope, including all deliverables and internal, external, and project management work. It ensures that no work is omitted and no extra work is included beyond the scope. This rule is fundamental to scope management and prevents scope creep or gaps.
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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Scope verification
Why it's wrong here
Scope verification is the process of formalising acceptance of completed deliverables, not a WBS construction rule. It is tempting because both concern scope, but the 100% rule governs decomposition completeness during planning, whereas verification confirms acceptance after delivery.
- ✓
100% rule
Why this is correct
The 100% rule requires the WBS to encompass all work implied by the project scope, including internal, external and project management deliverables, with no omissions or additions. Reviewing against it confirms every deliverable is captured, exactly as the stem demands.
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Rolling wave planning
Why it's wrong here
Rolling wave planning progressively elaborates the WBS as details emerge; it does not define the 100% rule. It tempts because both concern WBS elaboration, but the rule stating the WBS captures all scope, including internal, external and project management work, is the 100% rule.
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Decomposition rule
Why it's wrong here
Decomposition describes breaking deliverables into smaller, manageable work packages; it is a technique, not the rule guaranteeing completeness. It tempts because decomposition builds the WBS, but the rule stating the WBS must capture 100% of project scope is the 100% rule.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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