This guidance describes how to use a RACI [Responsible, Accountable, Consult, Inform] Matrix when determining project responsibilities.
When you're starting a project, there are all kinds of people with fingers in the pie. There are people who want to be on the team. There are people who are affected by the work. There are people who aren't affected by the project but whose budget IS. There are people who don't want the project to succeed, but will only privately work against it. There are people who need to know stuff…but other people who WANT to know stuff.
How do we help project managers - or how do WE as project managers - keep track of who's responsible for what? We use a responsibility matrix. The best one is called the RACI - pronounced Ray-See.