CAPM Predictive Plan-Based Methodologies Practice Question
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 is developing a work breakdown structure (WBS) for a software development project. The team is struggling with defining the lowest-level work packages. Which technique should the project manager use to ensure the WBS is complete and properly decomposed?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Decomposition
Decomposition is the correct technique because it is the process of subdividing project deliverables into smaller, more manageable components until the work package level is reached. This directly addresses the team's struggle with defining the lowest-level work packages, ensuring the WBS is complete and properly decomposed by breaking down deliverables iteratively.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Decomposition
Why this is correct
Decomposition is the technique that subdivides deliverables into work packages.
Related concept
Read the scenario before looking for a memorised answer.
✗
Critical path method
Why it's wrong here
Critical path method is a schedule analysis technique, not related to WBS decomposition.
✗
Expert judgment
Why it's wrong here
Expert judgment is a tool used during decomposition, but the technique itself is decomposition.
✗
Rolling wave planning
Why it's wrong here
Rolling wave planning is a form of progressive elaboration, not the technique for initially decomposing the WBS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse decomposition with rolling wave planning, thinking that progressive elaboration is the same as breaking down the WBS, but decomposition is a distinct, structured technique applied upfront to create a complete WBS, not a phased planning approach.
Detailed technical explanation
How to think about this question
Decomposition involves identifying and analyzing deliverables, structuring the WBS, identifying lower-level components, verifying correctness, and assigning codes. A common subtlety is the '100% rule' — the sum of work at the child level must equal 100% of the work at the parent level, ensuring no gaps or overlaps. In practice, work packages should be decomposed to a level where duration and cost can be reliably estimated (often 8-80 hours of effort).
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Predictive Plan-Based Methodologies — This question tests Predictive Plan-Based Methodologies — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Decomposition — Decomposition is the correct technique because it is the process of subdividing project deliverables into smaller, more manageable components until the work package level is reached. This directly addresses the team's struggle with defining the lowest-level work packages, ensuring the WBS is complete and properly decomposed by breaking down deliverables iteratively.
What should I do if I get this CAPM question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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