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The Resource Assignment Matrix
A resource assignment matrix or a RAM you might see it referred to on the PMP exam, shows the project resources assigned to each work package. Each thing that we’re working on and who is working on it. It is used to illustrate the connections between work packages or activities and the project team members.
An example of a resource assignment matrix that you may be familiar with, or one of the most common ones is a RACI chart which is Responsible, Accountable, Consult (who needs to be consulted) and who needs to be Informed.
The RACI chart is a useful tool to ensure clear assignment of resource roles and responsibilities when the team consists of internal and external resources. As you can see we’ve got the activity of the Project Charter, and who’s creating that? Well Ben is Responsible for that, Anne is Accountable for that so she may need to sign off on that particular item, and we need to inform Carlos, Dina and Ed.
Then the task of collecting requirements – who’s responsible? Carlos is responsible here and Ben needs to sign off on that particular item, he is Accountable for it to make sure that it is done.
A resource assignment matrix can be developed at various levels of your work breakdown structure. In other words you can do it at a higher level, at the high level feature or you can break it down. At the high level it might define those responsibilities of the whole project or of the whole team or a group or a unit, but as we break our work down into smaller activities that we can actually estimate and deliver on, then our lower level matrix might be used within the group to designate roles responsibilities and the levels of authority within that particular work item. So it provides a lot of clarity, there’s no confusion about who is ultimately in charge or who has authority to do the work.
And that is the benefit of your resource assignment matrix.
– David McLachlan