Category: Roles & Accountability

RACI Matrix

Also known as: RACI, Responsibility Assignment Matrix, RACI Chart, RACI Model

Simply put

A RACI matrix is a simple table used to clarify who does what for each task, decision, or deliverable in a project or process. It maps roles against activities so that everyone understands their part, avoiding confusion over who is doing the work and who is answerable for it. The name comes from four role types the tool typically assigns: Responsible, Accountable, Consulted, and Informed.

Formal definition

A RACI matrix is a responsibility assignment tool that structures roles and activities on two axes, with roles (or role types) on one axis and tasks, deliverables, or decisions on the other, and assigns each intersection one or more designations. In its basic form these designations are Responsible (the party performing the work), Accountable (the party ultimately answerable for the outcome), Consulted, and Informed; per the evidence, the Consulted and Informed designations are not fully specified beyond the standard letters. Originating in project management practice, the tool is applied to clarify and distribute accountability across a team. Variants such as RASCI extend the model with an additional role. Note: the evidence provided describes RACI in a general project-management context and does not address its application to AI governance or model risk management, so any use in those settings should be scoped and validated against the relevant framework rather than assumed from this general definition.

Why it matters

In AI governance, a recurring failure mode is ambiguity over who does the work and who is answerable for the outcome. A RACI matrix addresses this by making role assignments explicit, so that for a given task, decision, or deliverable there is a clearly named Responsible party performing the work and an Accountable party ultimately answerable for it. This clarity supports the separation of duties that governance structures typically rely on, and it can help articulate distinctions such as first, second, and third lines of defense without collapsing them into a single undifferentiated team.

The evidence supporting this entry describes RACI as a general project-management tool for clarifying roles and responsibilities within a team. It does not establish any specific application of RACI to AI governance or model risk management. Organizations that adopt RACI for AI oversight should therefore treat it as a structuring aid rather than a governance framework in itself: it can document accountability, but it does not by itself define what activities must occur, and it does not eliminate risk.

Because the accountability designations depend entirely on how each intersection is filled in, a RACI matrix can be misapplied. A common pitfall is assigning multiple Accountable parties to the same activity, which can dilute the very accountability the tool is meant to clarify. Any use in an AI governance or model risk context should be scoped and validated against the relevant framework rather than assumed from RACI's general definition.

Who it's relevant to

AI Governance Professionals

Governance specialists may use a RACI matrix to document who performs, who is answerable for, and who is consulted or informed about specific oversight activities. Because the evidence describes RACI only in a general project-management context, its designations should be defined against the organization's governance framework rather than assumed, and it should be understood as an accountability-mapping aid rather than a governance program on its own.

Project and Program Managers

This is the setting in which RACI originated. Project managers use the matrix to diagram every task, milestone, or key decision and assign team roles, reducing confusion over who owns work and who is answerable for outcomes.

Auditors and Second-Line Functions

A documented RACI matrix can serve as evidence of how responsibilities and accountability are distributed across activities, which may support reviews of role clarity and separation of duties. Reviewers should confirm that each activity has a single, clearly identified Accountable party and that the mapping reflects actual practice, since the tool documents intended assignments rather than guaranteeing they are followed.

Inside RACI

Responsible (R)

The party or role that performs the work or executes the task. In an AI governance or model risk context, this is typically the individual or team carrying out an activity such as model development, documentation, or validation testing. More than one role can be Responsible for a given activity.

Accountable (A)

The single role that bears ultimate ownership and answerability for the outcome of a task or decision. In many governance frameworks a matrix is designed so that only one role is Accountable per activity to preserve clear ownership; this role often approves the work performed by those who are Responsible.

Consulted (C)

Roles whose input, expertise, or opinion is sought before or during an activity, typically through two-way communication. In AI oversight this may include legal, compliance, or subject-matter experts consulted on model use, controls, or risk assessment.

Informed (I)

Roles that are kept updated on progress or outcomes, usually through one-way communication, without being expected to contribute directly. This can include senior oversight functions or stakeholders notified of model approvals or issues.

Activity-to-role mapping

The tabular structure that intersects specific activities, tasks, or decisions (rows) with organizational roles (columns), assigning one or more of the R, A, C, or I designations at each intersection to clarify who does what.

Common questions

Answers to the questions practitioners most commonly ask about RACI.

Does a RACI matrix by itself establish AI governance for an organization?

No. A RACI matrix is a role-assignment tool that clarifies who is Responsible, Accountable, Consulted, and Informed for defined activities. It documents allocation of duties but does not, on its own, constitute a governance framework. Governance typically also requires policies, oversight structures, escalation paths, decision rights, and monitoring; the RACI matrix is one supporting artifact within that broader set rather than a substitute for it.

Is the 'Accountable' role in a RACI matrix the same as the 'Responsible' role?

No, and professionals frequently blur these. In the RACI convention, the Responsible party performs the work, while the Accountable party owns the outcome and holds final approval authority. Many practitioners treat the two as interchangeable, but the distinction matters for governance because accountability is typically assigned to a single named owner per activity, whereas responsibility for execution can be shared. Conflating them can obscure who ultimately answers for a decision.

How does a RACI matrix relate to the three lines of defense model?

A RACI matrix can be used to map activities across the first, second, and third lines of defense, helping clarify which line performs, owns, is consulted on, or is informed about a given control. It does not define the lines themselves, but it can make their respective duties explicit for specific tasks. Care should be taken not to assign a review or challenge activity in a way that undermines the independence expected between lines, for example placing execution and independent oversight of the same activity with the same party.

At what level of detail should activities be defined in a RACI matrix for AI or model-related work?

Activities are commonly defined at a granularity that lets each row map to a distinct decision or deliverable, such as data sourcing, model development, validation, approval, deployment, and ongoing monitoring. Too coarse, and the matrix obscures who owns discrete steps; too granular, and it becomes difficult to maintain. The appropriate level depends on the organization and the specific process, so there is no single prescribed granularity.

How many parties should typically be assigned as Accountable for a single activity?

In the common RACI convention, a single activity has one Accountable party to preserve clear ownership, while Responsible, Consulted, and Informed roles may be assigned to multiple parties. Assigning more than one Accountable party for the same activity is a frequent source of confusion and can dilute clear ownership. Organizations vary in how strictly they apply this convention.

How should a RACI matrix be kept current as roles or systems change?

A RACI matrix is typically treated as a living document, reviewed and updated when responsibilities, organizational structures, or the underlying systems change. Common practice is to tie reviews to defined triggers such as reorganizations, changes in model or system scope, or periodic governance reviews, and to version-control the matrix. Because a stale matrix can misstate who owns a control, keeping it aligned with actual practice is generally considered part of maintaining its usefulness.

Common misconceptions

A RACI matrix by itself establishes an organization's AI governance or model risk management program.

A RACI matrix is a role-clarification and accountability-mapping tool. It can support governance and model risk management by documenting responsibilities, but it does not substitute for the policies, control frameworks, validation activities, or oversight structures that constitute a governance or risk program. Its usefulness depends on being embedded within those broader structures.

The Accountable and Responsible roles are interchangeable, so it does not matter how many roles carry each designation.

The two designations are distinct: Responsible denotes those performing the work, while Accountable denotes ownership and answerability for the outcome. Many practitioners deliberately assign a single Accountable role per activity to avoid diffused ownership, whereas multiple Responsible parties are often acceptable. Blurring the two undermines the clarity the matrix is meant to provide.

A RACI matrix maps directly onto the three lines of defense model.

A RACI matrix records who is Responsible, Accountable, Consulted, and Informed for tasks; the three lines of defense describe a separation of risk ownership, oversight, and independent assurance. The two can be used together, and a RACI can help document how lines-of-defense roles engage with an activity, but they are different constructs and should not be treated as equivalent.

Best practices

Assign a single Accountable role for each activity wherever practical, to preserve clear ownership and avoid ambiguity about who answers for the outcome.

Define the specific activities, tasks, and decisions in the matrix at a granular enough level that each R, A, C, and I assignment is meaningful and unambiguous.

Distinguish Consulted (two-way input before or during a task) from Informed (one-way notification) so that communication expectations are explicit rather than assumed.

Review and update the matrix when roles, organizational structures, or activities change, treating it as a living document rather than a one-time artifact.

Embed the matrix within broader governance and control documentation rather than relying on it in isolation, so that responsibilities connect to actual policies and oversight processes.

Validate the matrix with the roles named in it to confirm that assigned parties understand and accept their designations before it is finalized.