In business and project management, a responsibility assignment matrix[1] (RAM), also known as RACI matrix[2] (/ˈreɪsi/; responsible, accountable, consulted, and informed)[3][4] or linear responsibility chart[5] (LRC), is a model that describes the participation by various roles in completing tasks or deliverables[4] for a project or business process. The four key responsibilities most typically used being: responsible, accountable, consulted, and informed. It is used for clarifying and defining roles and responsibilities in cross-functional or departmental projects and processes.[6] There are a number of alternatives to the RACI model.
There is a distinction between a role and individually identified people: a role is a descriptor of an associated set of tasks; may be performed by many people; and one person can perform many roles. For example, an organization may have ten people who can perform the role of project manager, although traditionally each project only has one project manager at any one time; and a person who is able to perform the role of project manager may also be able to perform the role of business analyst and tester.
Very often the role that is accountable for a task or deliverable may also be responsible for completing it (indicated on the matrix by the task or deliverable having a role accountable for it, but no role responsible for its completion, i.e. it is implied). Outside of this exception, it is generally recommended that each role in the project or process for each task receive, at most, just one of the participation types. Where more than one participation type is shown, this generally implies that participation has not yet been fully resolved, which can impede the value of this technique in clarifying the participation of each role on each task.
The matrix is typically created with a vertical axis (left-hand column) of tasks (from a work breakdown structure) or deliverables (from a product breakdown structure), and a horizontal axis (top row) of roles (from an organizational chart).
Another example from the maintenance and reliability community:
There are a number of alternatives to the RACI participation types:
To be used when working on governance, risk, compliance (GRC) and outsourcing matters:
Lead, Accountable, Consult, Tasked, Informed
There are also a number of variations to the meaning of RACI participation types:
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