RACI Matrix (Responsible, Accountable, Consulted, Informed)

A RACI matrix is a responsibility-assignment chart that maps the people on a project against the tasks or deliverables, marking each person's relationship to each task with one of four letters. R is Responsible — the people who actually do the work. A is Accountable — the single person who owns the outcome and answers for it, with the authority to approve the Responsible parties' work. C is Consulted — people whose input is sought before the work is done, in two-way dialogue. I is Informed — people kept up to date on progress or completion, in one-way communication. Laid out as a grid with tasks down the rows and roles across the columns, a RACI matrix makes the whole division of labor visible at a glance, so gaps and overlaps in responsibility stand out.

The defining rule of RACI is that every task has exactly one Accountable — one and only one person who owns the result. You can have several people Responsible for doing the work, several Consulted, and many Informed, but accountability is singular by design. That single-Accountable rule is what makes the matrix useful: when ownership is shared, it is effectively owned by no one, and tasks slip. RACI forces a project to answer, for each piece of work, the question who is on the hook here. Marketers and operators use it to set up campaigns, launches, and cross-functional programs so that the doer, the owner, the advisors, and the audience for updates are all named before work begins, rather than argued about after something is missed.

RACI sits at the center of a family of role frameworks, and the differences are practical. RACSI (also written RASCI) adds a fifth role — Support — for people who actively help the Responsible parties do the work, as distinct from Consulted advisors who only offer input. So RACSI is RACI with an explicit helper role, useful when execution leans on support resources you want to name. DACI (Driver, Approver, Contributors, Informed) is not a general task matrix at all but a decision framework: it splits ownership into a Driver who runs the decision and an Approver who makes it, where RACI's single Accountable rolls those together. Bain's RAPID (Recommend, Agree, Perform, Input, Decide) is likewise decision-focused and adds a veto-style Agree role and an execution Perform role.

Choosing among them comes down to what you are mapping. Use a RACI matrix to assign responsibilities across many tasks in a project or ongoing process, when the central question is who does and who owns each piece of work. Use RACSI when support roles are material enough to name separately. Use DACI or RAPID when the thing you are clarifying is a decision rather than a set of tasks, and you need to be explicit about who decides, who must agree, and who carries it out. The common ancestor is the single owner — RACI's one Accountable, DACI's one Approver, RAPID's one Decide — because every one of these frameworks exists to stop responsibility from dissolving into a crowd.

Using a RACI matrix well means filling it in collaboratively, task by task, and enforcing the one-Accountable rule without exception. For each row, name the single owner first, then the doers, then who must be consulted, then who is merely informed. Watch for two telltale defects in a finished matrix: a task with no Accountable (an orphan no one owns) and a task with two Accountables (shared ownership that will fail under pressure). Watch also for rows crowded with Consulted and Informed marks, which signals a process drowning in stakeholders. Keep the matrix visible and revisit it when scope changes, because a RACI that no one updates quietly drifts out of line with how the work really runs.

The failures are predictable: more than one Accountable per task, tasks left with no owner at all, confusing Responsible (does the work) with Accountable (owns the outcome), and over-consulting until the C and I columns are so full that real work crawls. The discipline is to treat the matrix as a shared contract — one owner per task, clear doers, a disciplined consult list, and an honest informed list — and to maintain it as the project evolves. Done that way, a RACI matrix turns a tangle of who-was-supposed-to-do-what into a clear, durable map of responsibility that holds up when something goes wrong.

A RACI matrix (Responsible, Accountable, Consulted, Informed) is the classic responsibility-assignment matrix mapping people to tasks, with the defining rule of exactly one Accountable owner per task.

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