CAPM Practice Question: Project Management Fundamentals and Core Concepts
Which TWO are benefits of creating a Work Breakdown Structure (WBS)?
⚠ Common exam trap
CAPM often tests the confusion between WBS benefits and other project management artifacts, such as risk identification or activity sequencing, leading candidates to select incorrect options.
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
✓
Defines the total scope
Option B is correct because the WBS decomposes the entire project deliverable into progressively smaller work packages, thereby defining and confirming the total scope of the project and preventing scope creep. Option C is correct because these work packages provide the granular level at which costs can be estimated, budgeted, and later controlled, making the WBS the foundation for cost estimating. Option A is not a WBS benefit because risk identification is performed through risk management processes such as risk identification workshops, not through scope decomposition. Option D is not a WBS benefit because resource assignment occurs in schedule and resource planning activities (for example, using a RACI chart or resource histogram), not in the WBS itself. Option E is not a WBS benefit because activity dependencies are determined through sequence activities techniques such as precedence diagramming, which is part of schedule development rather than 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.
- ✗
Identifies project risks
Why it's wrong here
A WBS decomposes deliverables into manageable work packages; risk identification is a separate process using checklists, assumptions analysis or brainstorming. It is tempting because decomposition does surface unknowns, but the WBS itself is not a risk register input and does not formally identify risks.
- ✓
Defines the total scope
Why this is correct
The WBS decomposes all project deliverables into work packages, so nothing required by the scope statement is omitted and nothing outside it is included. This complete hierarchical decomposition is what defines and confirms the total scope baseline.
- ✓
Provides a basis for cost estimates
Why this is correct
A WBS decomposes deliverables into work packages, giving a hierarchical, manageable scope against which costs can be estimated bottom-up. This satisfies the stem's requirement for a benefit, since each work package supplies the granularity needed for reliable cost estimates across the project.
- ✗
Assigns resources to activities
Why it's wrong here
Assigning resources to activities is part of resource estimation, not a direct benefit of the WBS.
- ✗
Shows dependencies between activities
Why it's wrong here
Dependencies are documented in the precedence diagramming method or network diagram, not the WBS, which shows hierarchical decomposition of deliverables. It tempts because WBS work packages feed into sequencing, but the WBS depicts containment, not logical relationships.
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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 PMI exam blueprint
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