What Automation Can and Cannot Catch
Know the roughly 30 percent ceiling of tooling.
Automation Is a Helper, Not a Judge
Automated tools scan your page and flag likely problems in seconds. They are a powerful first pass, but they cannot tell you if a page truly works for real people.
The Famous 30 Percent Ceiling
Studies suggest automated tools catch only around 30 percent of accessibility issues. The other seventy percent still need a human to find them.
All lessons in this course
- What Automation Can and Cannot Catch
- Scanning With axe DevTools and Lighthouse
- Wiring axe-core Into Playwright Tests
- Linting and CI Gates for Accessibility