Which of the following best defines the Agile Release Train (ART)?

The Agile Release Train (ART) is best defined as a long-lived team of Agile teams that works collaboratively to deliver value. This concept is essential in the Scaled Agile Framework (SAFe), as it emphasizes teamwork and collective responsibility across multiple Agile teams.

ARTs are typically composed of 5 to 12 Agile teams, and they operate under a shared mission and objectives, coordinating their activities using synchronized iterations and program increments. This arrangement promotes alignment, transparency, and a focus on delivering cohesive value to the organization and its stakeholders.

By functioning as a unit, ARTs can manage dependencies, reduce delays, and enhance collaboration among teams, leading to consistent delivery of higher quality products and services. The long-lived structure also supports continuous improvement and the ability to adapt to changing needs and circumstances within the organization.

Other options do not capture the essence of the ART. For instance, considering a team of developers working in isolation does not reflect the collaborative nature required for successful Agile practices. A long-term project plan does not align with Agile principles that favor adaptive planning and incremental delivery. Finally, while virtual teams can exist, an ART encompasses more than just remote work; it focuses on the synergy between multiple teams to deliver integrated value.