Level 1
Can visually show different states of a component through multiple artboards / storyboarding.
Level 2
Is comfortable creating a finished site design from approved wireframes, resolving the nuances of the UI in a consistent and on-brand way.
Level 3
Creates best-practices UI that is intuitive for users. Can create a common style across all UI in an interface. Knows the basics of how UI will translate into code and pitfalls to avoid.
Level 4
Creates imaginative, on-brand ways to address common UI challenges. Publishes work on behalf of the company. Can create animated prototypes and interactive demos.
Level 5
Can handle the most complex UI challenges elegantly with on-brand design, for any product or website. Is known as a top UI designer worldwide.