One of the ingredients of Scrum is a practice known as sashimi. Sashimi is a Japanese delicacy consisting of thin slices of raw fish. Each slice is complete in itself, a complete taste similar to the way every other slice tastes.
Scrum uses the sashimi technique to require that every slice of functionality created by the developers be complete. All of the requirements gathering and analysis, design work, coding, testing, and documentation that constitute a complete product are required to be completed in every Sprint and demonstrated in the Sprint increment of functionality. Sprints are kept short enough that the stakeholders don’t lose interest in the project before the Sprints are completed. And stakeholders can see that they have an opportunity to redirect the project at the start of every Sprint to optimize the value they derive from the project.
At the end of every Sprint, stakeholders see new functionality. Models, requirements, and internal artifacts might be of use to the developers, but they are never shown to the stakeholders.