The Scrum of Scrums is the key for scaling large, multidimensional projects that cross departments, teams, and traditional boundary lines so that can be managed using the same protocols and logic of a fundamental, small-team project. Bryan Zarnett explains that where most ScrumMasters fail in this large-scale environment is in the nuances of communicating and coordinating multiple teams. The same tool set used to run a small Scrum team cannot be used for a collective of teams. He defines the role of an Agile Program Manager (APM) that will coordinate the program portfolio and its dependencies and manage collective activities, issues, and risks. Regardless of design, the APM cannot operate 100 percent according to a Scrum textbook. Minor modifications to the tool set and the introduction of key new responsibilities will adapt and influence Scrum in minor ways that will allow the larger program context to be applied — and will allow teams to remain Agile even as size and interdependencies increase.