Agile methods depend on effective cross-functional teams. We’ve heard many Agile success stories…at the team level. But what happens when a product can’t be delivered by one team? What do you do when the “team” that’s needed to work on a particular product is 20 people? Or 20 teams? One response is to create a coordinating role, decompose work, or add layers of hierarchy. Those solutions introduce overhead and often slow down decision making. There are other options to link teams, and ensure communication and integration across many teams. There are no simple answers. But there are design principles for defining workable arrangements when the product is bigger than a handful of agile teams. In this talk, I’ll cover principles and practices and explain how they work together to address coordination, integration, and technical integrity without adding levels of hierarchy or bureaucracy.