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Release Trains
The Release Train (also known as the Agile Release Train or ART) is a long-lived team of Agile teams, which, along with other stakeholders, develops and delivers solutions incrementally, using a series of fixed-length Iterations within a Program Increment (PI) timebox. The ART aligns teams to a common business and technology mission.
Details
ARTs are cross-functional and have all the capabilities—software, hardware, firmware, and other—needed to define, implement, test, and deploy new system functionality. An ART operates with a goal of achieving a continuous flow of value.
ARTs include the teams that define, build, and test features and components. SAFe teams have a choice of Agile practices, based primarily on Scrum, XP, and Kanban. Software quality practices include continuous integration, test-first, refactoring, pair work, and collective ownership. Hardware quality is supported by exploratory early iterations, frequent system-level integration, design verification, modeling, and Set-Based Design.
Agile architecture supports software and hardware quality. Each Agile team has five to nine dedicated individual contributors, covering all the roles necessary to build a quality increment of value for an iteration. Teams can deliver software, hardware, and any combination. And of course, Agile teams within the ART are themselves cross-functional.