September 6, 2026 · 8 min read
TL;DR: A RACI chart maps work to people; a WBS dictionary describes the work itself. One Accountable per row, always. When you need people from a functional manager, negotiate with that manager before escalating, because acquiring the team is your job and they are the one who can say yes. An over-allocated resource histogram means the schedule as drawn cannot be delivered.
Resource management questions look like people questions and behave like process questions. The scenario is usually somebody unavailable, overloaded, or unwilling, and the four options are all things a reasonable project manager might do. What separates the keyed answer is usually a small piece of vocabulary, or a single fact about who holds the authority.
Responsible does it. Accountable answers for it. And there is exactly one Accountable.
| Letter | Role | How many per row | The test |
|---|---|---|---|
| R — Responsible | Performs the work | One or more | Who does the doing |
| A — Accountable | Answers for the outcome, approves it | Exactly one | Whose neck is on the line |
| C — Consulted | Gives input before, two-way | Zero or more | Whose expertise shapes it |
| I — Informed | Told about it after, one-way | Zero or more | Who needs to know, not decide |
The single-Accountable rule is the one the exam actually tests, because it is the one that means something. Two Accountable entries on a row is not thoroughness, it is an unresolved question about who decides, and it surfaces on the project as exactly the delay you would expect. Consulted and Informed get confused in the other direction: Consulted is a conversation before the decision, Informed is a notification after it, and promoting someone from Informed to Consulted is a real commitment of time you will have to fund.
RACI is one form of a responsibility assignment matrix, which is the more general term. The exam uses both, and RAM appears in older material and in matching questions.
Common trap: answering an assignment question with a definition tool. The bank has a clean instance: a project is behind schedule, a team member asks what to work on, and a senior analyst suggests jointly building the WBS dictionary, when what the team actually needs is to know who is doing what. The keyed answer is to build a resource assignment matrix with the analyst and coach them on how it differs from a WBS dictionary. The analyst's suggestion is not a bad technique, it is a technique for a different problem. The distractor works because a WBS dictionary is genuinely useful and genuinely PMI-approved, which is precisely the shape of the wrong answers this bank flags most often across its 47 resource questions.
By negotiating with whoever does have that authority, before you go around them.
The pattern the exam favours: Liam manages a software project in a large IT firm and emails a functional manager asking for several staff to be assigned permanently for two weeks. The functional manager refuses. What now?
Negotiate with the functional manager. Two facts make that the answer. First, acquiring the project team is the project manager's own responsibility, so this is not something to hand off. Second, the functional manager controls the staff, which makes them the only person who can say yes. Negotiation is also where you find out what would make a release possible, which an email never surfaces: maybe not permanently, maybe not those three people, maybe not those two weeks. Escalating to a sponsor is premature because it goes over a head you have not yet genuinely talked to, and it costs you the working relationship for every future request.
Two variations worth recognising:
An over-allocated resource histogram tells you the schedule is fiction until you fix it.
A resource histogram plots demand against availability over time. When several team members show as loaded well above capacity in the same weeks, that is over-allocation, and the honest reading is that the project probably cannot be completed as currently scheduled. The work shown cannot be done in the time shown by the people named.
The two responses are worth keeping distinct, because they have different costs:
A related idea that shows up in resource-constrained scenarios is the Theory of Constraints sequence: identify the constraint, exploit it (get more out of it at no cost), subordinate everything else to keeping it running at capacity, then elevate it by adding resources or money. The order is economic rather than arbitrary. It spends nothing until it has to, and improvements made anywhere except the constraint are invisible in the output. Ordering questions on this sequence reliably offer "elevate" too early, because throwing resources at a bottleneck feels like action.
What is the difference between Responsible and Accountable in a RACI chart? Responsible performs the work; Accountable answers for the outcome and approves it. Several can be Responsible, exactly one is Accountable, because split accountability means nobody carries it.
How is a RACI chart different from a WBS dictionary? RACI maps work to people and answers who is doing what. The WBS dictionary describes each work package: deliverable, acceptance criteria, assumptions, resources. Assignment versus definition.
What should you do when a functional manager refuses to release staff? Negotiate with them directly. Acquiring the team is your responsibility and they control the resource. Escalating before a genuine attempt at agreement goes over their head and costs you the relationship.
What does a resource histogram showing over-allocation mean? The project probably cannot be delivered on the current schedule until resources are leveled or smoothed. Leveling can move the end date; smoothing stays inside float and does not.
The 47 resource management questions in PMP Practice are re-certified against PMBOK 8 and the July 2026 Exam Content Outline, and every wrong answer comes with the reasoning that makes it wrong, explained rather than just marked. Start the free 20-question sample with no card and no signup.
Related: Servant leadership vs traditional project management · Tuckman's stages of team development · Process study guide
Sources: PMI — PMP Examination Content Outline, 2026 (PDF) · PMI — PMBOK Guide standards
What is the difference between Responsible and Accountable in a RACI chart?
Responsible is who performs the work. Accountable is who answers for the outcome and holds the authority to approve it. There can be several Responsible entries on a row but only ever one Accountable, because splitting accountability means nobody carries it. Consulted parties give two-way input before the work; Informed parties get one-way notification after.
How is a RACI chart different from a WBS dictionary?
A RACI chart, or responsibility assignment matrix, maps work against people and answers who is doing what. A WBS dictionary describes each work package in detail: its deliverable, acceptance criteria, assumptions, and resources. They answer different questions, and the exam pairs them specifically to test whether you can tell an assignment problem from a definition problem.
What should you do when a functional manager refuses to release staff to your project?
Negotiate directly with that manager first. Acquiring the team is the project manager's own responsibility, and the functional manager controls the resource, so they are the person who can say yes. Escalating before you have genuinely tried to reach agreement goes over their head and damages the relationship you will need for the rest of the project.
What does a resource histogram showing over-allocation mean?
That the project probably cannot be completed as currently scheduled. When demand exceeds availability in the same weeks, the work as scheduled cannot physically be done in the time shown until the resources are leveled or smoothed. Resource leveling can extend the schedule; resource smoothing works within existing float and does not.