Roles and responsibilities:
Role – the label describing the portion of a project for which a person is accountable. E.g. civil engineer, court liaison, business analyst and testing coordinator.
Authority – the right to apply project resources, make decisions and sign approvals.
Responsibility – the work that a project team member is expected to perform in order to complete the project's activities
Assigning people to roles means subordinating specific names to roles, defining a person's capacity for a project, prices, and other information.