In SAFe, which artifact showcases the progress of the entire Agile Release Train?

The correct choice is the System Demo, which is a significant artifact in the Scaled Agile Framework (SAFe) that showcases the progress of the entire Agile Release Train (ART). The System Demo is an integrated demonstration of the current state of the system that is used to evaluate all the features and functionality delivered by the multiple teams within the ART at a specific point in time, usually at the end of a Program Increment (PI).

Through the System Demo, stakeholders can observe how the individual teams' contributions come together to form a cohesive product, providing valuable insights into the overall progress and alignment with business objectives. It also fosters transparency among team members and stakeholders, enabling feedback that drives improvements for future increments.

In contrast to the System Demo, the Product Vision defines the overarching goals and aspirations of the product but does not provide a measurement of progress. The Program Backlog contains the prioritized features and enablers needed to achieve those goals but does not showcase completed work. Lastly, the Iteration Review focuses on the work completed within a single iteration rather than the broader scope of the ART's progress. This highlights the unique role of the System Demo as a comprehensive progress indicator for the entire ART.