The RACI matrix is a tool that clarifies the roles and responsibilities of individuals or groups in a project’s successful completion. It helps to define who is Responsible, Accountable, Consulted, and Informed for each task or deliverable. This is particularly useful in addressing governance issues like the one described, where a team member is receiving conflicting assignments. By establishing a RACI matrix, the project manager can ensure that everyone knows who is responsible for what, thus preventing confusion and inefficiency.