The document discusses the RACI (Responsible, Accountable, Consulted, Informed) matrix, which is used to define roles and responsibilities in a project. It provides examples of RACI matrices for different project elements like planning, requirements, design, testing, and deployment. The RACI matrix defines: - Responsible (R) - those who do the work to achieve the task. - Accountable (A) - the ultimate authority who ensures the task is completed. - Consulted (C) - those whose opinions are listened to and with whom there is two-way communication. - Informed (I) - those who are kept up-to-date