The project management phrase influence diagram refers specifically to a project management tool that can serve an invaluable role to the project management team as well as the project management team leader. The influence diagram refers to a particular tool used by the project team that is comprised of a chart, diagram, or other exclusive graphical representation of a number of situations that depict and display all particular influences on a on the project and or the particular project management activity. These can include influences that are both significant as well as some influences that may be less significant but are in fact more casual in nature. The influence diagram also takes into account and displays a representative graphic of the particular time ordering in which events should and are expected to take place, as well as any other specific relationships that may exists among the expected part anticipated variables and outcomes.
This term is defined in the 3rd and the 4th edition of the PMBOK.