For an expanded view of these three groups, take a look at the following diagram representing categories of stakeholders on a project. The center circle in purple represents those stakeholders internal to the project that are actually working on the project itself. Those three circles outside of that in various shades of blue represent those stakeholders outside of the project, but within the organization; these include the sponsor, the program/portfolio managers, the functional managers and the managers of ongoing operations at an organization. The third category comprises the outer two circles in different shades of green which represent those stakeholders that are outside the organization: sellers, business partners, customers/users, and then regulatory agencies. There is a detailed explanation of each circle of stakeholders below the diagram.