A responsibility assignment matrix (RAM) is one way of showing some of the roles and responsibilities in the project. It is usually a table with the staff (by role or name) crossed by the responsibility (by work package or activity). The intersections in the table formed by these categories in the rows and columns, identify the level of participation in the activity. The example given in the PMBOK, 5th edition, p. 262 is RACI. RACI stands for responsible, accountable (or in some schemes, approver or assists), consult and inform. There are a few variations.


Other terms for a responsibility assignment matrix include responsibility matrix or linear responsibility chart (LRC). Usually the columns are the people or roles and the rows are the activities, responsibilities, or functions. Sometimes the matrix will use the RASIC letters (responsible, approver, supporter, inform, consult). (In this case a supporter is someone doing part of the work, but not responsible to see that it is completed.) Instead of these letters, symbols can be use to identify the relationship between the individuals and the activities. Harold Kerzner[1] gives an example where the relationships symbols represent

  • general management responsibility
  • specialized responsibility
  • must be consulted
  • may be consulted
  • must be notified
  • must approve

He also gives an example of a communication responsibility matrix where the rows are the communication initiators, the columns are the recipients, and the symbols in the chart indicate the frequency of the reporting.

The matrix can be at different levels of the project or only cover one aspect, such as communications.


RACI Chart Person
Activity Zack Yvonne Xerxes Willow Vicky Ulfred
Create project charter I C A R C C
Develop project management plan I C A C R I
Collect work performance data I I A R C I

Participation key: R=Responsible A=Accountable C=Consult I=Inform

Another variation is RASIC for responsible, approver, supporter, informed, consulted. There may be additional rules. Some of the rules in some of the formats may be that every activity must have one (and only one) person (or role) identified as responsible. In some variations a person (or role) may participate in more than one way; some grid spots may not have any participation indicators.

RASIC Chart Person
Activity Tom Sarah Robin Qiao
Update stakeholder register I C A R
Maintain risk register S R C A
Submit change requests A C R

Participation key: R=Responsible A=Approver S=Supports I=Inform C=Consult

Another example:


* Legend: A: accountable; C: consulted; I: informed; R: responsible; S: supportive; V: verifier


  1. Project Management: A Systems Approach to Planning, Scheduling, and Controlling, 11th Edition, p 232-234.

External linksEdit