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Project Documentation10 min readMarch 2026

What Is a RACI Matrix? A Complete Guide for Project Managers

Learn what a RACI matrix is, how to build one, and how to use it to eliminate role confusion on your project.

AA
Anna Anderson, PMP · CSM · CSPO
Founder, ProjectPilot · Coached 125+ PMs into roles at Amazon, AWS, PwC & Anthropic

What Is a RACI Matrix?

A RACI matrix is a project management tool that defines the roles and responsibilities of every stakeholder for every task, deliverable, or decision in a project.

RACI is an acronym that stands for:

  • R — Responsible: The person who does the work. The one executing the task.
  • A — Accountable: The person who owns the outcome. There should be exactly one Accountable per task.
  • C — Consulted: People whose input is required before the task is completed. Two-way communication.
  • I — Informed: People who need to be kept updated on progress or decisions. One-way communication.

Why Every Project Needs a RACI Matrix

Without a RACI matrix, role confusion is inevitable. Here is what it looks like in practice:

  • Two team members both think they own the same deliverable. Neither does it well.
  • A decision is made without consulting a key stakeholder. Work has to be redone.
  • A sponsor is blindsided because no one defined that they needed to be kept informed.
  • A task falls through the gaps entirely because everyone assumed someone else was responsible.

A RACI matrix prevents all of these scenarios by making role assignments explicit, documented, and agreed upon before work begins.

How to Build a RACI Matrix

1

List all tasks and deliverables

These become the rows of your matrix. Level of detail depends on project complexity — a high-level RACI covers major deliverables; a detailed RACI breaks down individual activities.

2

List all stakeholders

These become the columns. Use role titles rather than names where possible — this makes the RACI useful even if personnel change.

3

Assign the RACI letters

Rules: every task must have exactly one A, at least one R, selective use of C, and I for visibility-only stakeholders.

4

Review with stakeholders

This is where the real value is created. The conversation surfaces assumptions, gaps, and disagreements before they become project problems.

5

Get sign-off and share

Then treat it as a living document — update it when scope, team, or timeline changes.

Common RACI Mistakes

  • Multiple Accountable owners — two people sharing accountability means neither feels fully responsible.
  • Too many Consulted stakeholders — every C slows the project. If their input would not change the output, make them I instead.
  • Building it without stakeholder input — a RACI built alone is rarely accurate.
  • Never updating it — an outdated RACI is worse than none.
  • Using it as a blame tool — the RACI exists to clarify roles, not assign blame.
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