Design the complete interaction
Map the main tasks and include loading, empty, error and confirmation states. Keep navigation and terminology predictable. Prototype uncertain steps and observe representative users. Consider platform conventions and device constraints, including keyboards, small screens and interrupted connectivity.
Build an accessible design system
Use reusable components with clear labels, visible focus and sufficiently large controls. Check contrast, text resizing and screen-reader semantics. Avoid requiring colour, dragging or animation as the only way to understand or operate the product. Document the component states so that design and implementation remain consistent.
Measure task completion
A visually impressive screen is only useful if people can understand and operate it. Review onboarding, form completion and the action that creates value. Use feedback and product metrics to prioritise improvements. Accessibility needs both appropriate implementation and validation with relevant tools and users; a design system alone does not establish conformance.