mediumMultiple Choice
PK0-005 Practice Question: A project manager needs to break down the project…
A project manager needs to break down the project scope into smaller, manageable components. Which tool should they use?
⚠ Common exam trap
Candidates often confuse scheduling tools (PERT, Gantt) or role assignment tools (RACI) with scope decomposition, but the WBS is the only tool specifically designed to break down project scope into manageable components.
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)
The Work Breakdown Structure (WBS) is the correct tool because it decomposes the total project scope into hierarchical, manageable work packages. This aligns with the PMBOK Guide's definition of a WBS as a deliverable-oriented decomposition that facilitates planning, cost estimation, and responsibility assignment. Other tools like PERT or Gantt charts focus on scheduling, not 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.
- ✗
PERT chart
Why it's wrong here
A PERT chart models task dependencies and estimates durations for scheduling, using optimistic, pessimistic and most-likely times. It does not decompose scope into manageable components; the work breakdown structure does. PERT is tempting because it breaks work into activities, but those activities must already exist before PERT diagrams them.
- ✗
Gantt chart
Why it's wrong here
A Gantt chart schedules tasks along a timeline, showing durations, dependencies and progress. It cannot decompose scope into smaller components; the work breakdown structure does that. Gantt charts are tempting because they display every task, but they visualise scheduling of already-defined work, not its breakdown.
- ✗
RACI matrix
Why it's wrong here
A RACI matrix maps roles and responsibilities to tasks, clarifying who is accountable, consulted or informed. It does not decompose scope into deliverables. The work breakdown structure performs that decomposition. RACI is tempting because it also structures project work, but it addresses responsibility assignment, not scope definition.
- ✓
Work breakdown structure (WBS)
Why this is correct
A WBS hierarchically decomposes deliverables into progressively smaller work packages, defining the total scope. This directly satisfies the stem's need to break scope into manageable components, providing the foundation for estimating, scheduling and assigning responsibility.
Go deeper
Related to this question
About these practice questions
One of 954 original PK0-005 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PK0-005 practice question is part of Courseiva's free CompTIA 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 PK0-005 exam.