PK0-005 Tools and Documentation Practice Question
Which document defines the roles and responsibilities of stakeholders in a project and is often presented as a matrix?
⚠ Common exam trap
Many exam-takers confuse the stakeholder register (a list) with the RACI matrix (a matrix of roles and responsibilities), leading them to select Option C instead of the correct matrix-based document.
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
✓
RACI matrix
The RACI matrix (Responsible, Accountable, Consulted, Informed) is the correct document because it explicitly defines stakeholder roles and responsibilities in a project and is presented as a matrix format. This aligns with the PMBOK Guide and the PK0-005 exam objectives for Tools and Documentation, where the RACI matrix is the standard tool for clarifying participation levels across project tasks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
RACI matrix
Why this is correct
The RACI matrix maps each project task to who is Responsible, Accountable, Consulted and Informed, directly defining stakeholder roles and responsibilities. Its grid format satisfies the stem's "presented as a matrix" constraint, unlike a project charter or communications plan, which describe scope or messaging rather than assigning per-activity accountability.
- ✗
Communication plan
Why it's wrong here
A communication plan specifies what information is shared, with whom, when and how; it does not assign project roles. It is tempting because it maps stakeholders to information needs, which would be correct when defining reporting cadence and escalation paths rather than accountability.
- ✗
Stakeholder register
Why it's wrong here
A stakeholder register records stakeholder identification, interests, influence and engagement classification; it does not define role accountability across project activities. It is tempting because it lists stakeholders, which would be correct for engagement planning rather than assigning responsibility for deliverables.
- ✗
Project charter
Why it's wrong here
The project charter formally authorises the project and names the project manager, but it does not allocate responsibilities across stakeholders in matrix form. It is tempting because it documents high-level roles, which would be correct for project authorisation rather than detailed responsibility assignment.
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