Evaluating for accessibility
Accessibility checks should be done early and often throughout the design and development process. Finding and fixing problems before a product is released is much cheaper and easier than adding accessibility later.
Key point
Automated tools can find only some accessibility problems. Estimates vary, but these tools usually catch about 30 to 40 percent of the issues. Human testing, including with people who use assistive technology, is very important and cannot be replaced by tools alone.