These are the ways with which we measure any designer, they can be UX, UI, Visual etc.
Designer’s output is not any process driven results. It mainly depends upon the observation done by them.
They just don’t make things beautiful but they also take experience of users to next level. They try to make user experience seamless and frictionless
The designer’s job is not done after the design is finished. In fact the actual job of designer start after the design is done.
Job of observing user how they are experiencing their design.