Usability

2.25 Audit and test for bugs or issues requiring resolution

User Experience Design

2.26 Measure and test for performance

User Experience Design

2.27 Evaluate feature use, value, and impact

User Experience Design

2.28 Verify that real-world users can successfully use your work

User Experience Design

2.29 Regularly test and maintain compatibility

User Experience Design

3.6 Give third parties the same priority as first parties during assessment

Web Development

3.7 Ensure code follows good semantic practices

Web Development

3.9 Provide information to help understand the usefulness of a page

Web Development

3.10 Validate form errors and account for tooling requirements

Web Development

3.11 Structure metadata for machine readability

Web Development