Working software is the primary measure of progress.
— Agile Manifesto
Nothing works until it’s tested . . . .
— A SAFe assumption
The primary measure of Agile Release Train (ART) progress in SAFe is the System Demo, a fortnightly demonstration of the subject system being built by the ART. The importance of the system demo cannot be overstated. It is the means for gathering immediate, ART-level feedback from the people doing the work, as well as from sponsors, stakeholders, and Customers. The demonstration of the fully integrated work from all the teams during the prior Iteration is the only true measure of value, velocity, ...