Quick Answer
The correct answer is the Work Breakdown Structure (WBS), which is the technique used to decompose project scope into smaller, more manageable components. The WBS achieves scope decomposition by breaking the total project work into hierarchical work packages, each representing a deliverable-oriented grouping that enables detailed cost estimation, resource allocation, and task assignment. On the Certified Associate in Project Management (CAPM) exam, this question tests your understanding of the Scope Management knowledge area, specifically the “Create WBS” process, and often appears alongside distractors like the Gantt chart (a scheduling tool) or the RACI matrix (a responsibility tool). A common trap is confusing the WBS’s decomposition purpose with scheduling techniques, so remember: the WBS answers “what” needs to be done, not “when” or “who.” Memory tip: think of “WBS” as “What’s Broken into Small pieces” to recall its role in scope decomposition.
This CAPM practice question tests your understanding of predictive plan-based methodologies. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A project manager needs to decompose the project scope into smaller, more manageable components to provide a framework for detailed planning. Which technique should the project manager use?
RACI matrix
Why wrong: The RACI matrix assigns roles and responsibilities, not decomposition.
Critical Path Method (CPM)
Why wrong: CPM is used to analyze the schedule for the longest path, not to decompose scope.
Work Breakdown Structure (WBS)
The WBS breaks down the project scope into work packages for detailed planning.
Gantt chart
Why wrong: A Gantt chart is a visual representation of the project schedule, not a decomposition tool.
Answer choices
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)
Option C is correct because the Work Breakdown Structure (WBS) is the tool used to decompose scope into work packages. Option A is wrong because a Gantt chart is for scheduling, not decomposition. Option B is wrong because the RACI matrix is for responsibility assignment. Option D is wrong because the critical path method is for schedule analysis.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
RACI matrix
Why it's wrong here
The RACI matrix assigns roles and responsibilities, not decomposition.
Critical Path Method (CPM)
Why it's wrong here
CPM is used to analyze the schedule for the longest path, not to decompose scope.
Work Breakdown Structure (WBS)
Why this is correct
The WBS breaks down the project scope into work packages for detailed planning.
Related concept
Static NAT maps one inside address to one outside address.
Gantt chart
Why it's wrong here
A Gantt chart is a visual representation of the project schedule, not a decomposition tool.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CAPM NAT questions on configuration and troubleshooting.
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FAQ
Predictive Plan-Based Methodologies — This question tests Predictive Plan-Based Methodologies — Static NAT maps one inside address to one outside address..
The correct answer is: Work Breakdown Structure (WBS) — Option C is correct because the Work Breakdown Structure (WBS) is the tool used to decompose scope into work packages. Option A is wrong because a Gantt chart is for scheduling, not decomposition. Option B is wrong because the RACI matrix is for responsibility assignment. Option D is wrong because the critical path method is for schedule analysis.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CAPM NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
This CAPM practice question is part of Courseiva's free PMI certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CAPM exam.
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