The document discusses organizational structures for knowledge workers. It proposes that a hierarchical organizational model does not effectively enable collaboration and value delivery in today's environment. Alternatively, enterprises are looking to group teams into cross-functional, self-organizing teams but this approach has limitations. The document recommends achieving organizational agility at scale by setting up an ecosystem of constantly evolving, self-organizing teams supported by various structures. It provides examples of portfolio structures and the use of value centers, services centers, enablement teams, and traveler pools. Finally, it discusses using team service delivery patterns and team linking patterns to organize the structure and connections between teams.