Scaling Scrum for Large Projects is written from the perspective of a large project team that coordinates activities of multiple Scrum Teams in one big project to produce potentially shippable product increments/deliverables
Large projects require multiple Scrum Teams to work in parallel. Information gathered from one team may need to be appropriately communicated to other teams—the Chief Scrum Master is responsible for this activity.
The role of a Chief Scrum Master is necessary to ensure proper collaboration among the Scrum Teams. Coordination across various Scrum Teams working on a project is typically done through the Scrum of Scrums (SoS) Meeting. There is no hierarchy between the Scrum Masters: they are all peers. The Chief Scrum Master just works on a multi-team level, whereas the Scrum Masters work on a single team level.
The Chief Scrum Master can be chosen from the Scrum Masters of the large project or can be someone else. For very large projects, it is recommended to have a Chief Scrum Master who is not also a Scrum Master for an individual project because the effort required for the Chief Scrum Master role will prevent the Chief Scrum Master from also being able to dedicate enough time to the work with his/her Scrum Team. In either case, the Chief Scrum Master should have enough Scrum expertise to be able to foster collaboration and to help and coach others with the implementation of Scrum for a smooth delivery of the project’s products.
Apart from clearing impediments and ensuring a conducive project environment for the Scrum Teams, the Chief Scrum Master also collaborates with the Chief Product Owner, other Scrum Masters, and Product Owners in activities such as developing the list of components and resources needed in common for all teams throughout the project. He or she facilitates everything that goes beyond the realm of a single Scrum Team.
