User journey
Also called: critical journey, end-to-end journey, user flow
A user journey is the full path a person takes to get something done with a product, across every screen, system and device it touches.
A user journey starts with an intent, such as paying an invoice or booking a visit, and ends when the person has what they came for. It usually crosses several screens and more than one system.
Journeys are the most useful unit for organising quality work, because they are what users and the business recognise. A pass rate means little to a product owner. “Customers can book, change and cancel on both phones” means a great deal.
I ask each team for a short list of journeys that carry revenue, compliance or trust. Regression, readiness notes, UAT scope and performance thresholds all hang off that list.