It’s the “what”, not the “how”. That in a nutshell explains acceptance criteria; scenarios that need to be met so that a product, service, increment, or user story will be accepted and considered complete. Essentially they are conditions akin to pass or fail, on or off, black or white, there is no gray area. Within the realm of Scaled Agile Framework (SAFe®), acceptance criteria are part of each capability, feature, or story to be delivered by a single Agile Release Train (ART) with a Planning Interval (PI).