Individual Page Scores
Site Scoring begins by calculating a score per category for each page in a site's inventory. A page has a score for each enabled check category (Accessibility, Broken Links, etc) for the site. These page scores are dependent upon the number of Issues in each category on that page:
0 issues = 100
1 issue = 95
2 issues = 90
3 issues = 85
4 issues = 80
... continuing to subtract 5 from the score ... until reaching
20+ issues = 0
An issue is a type of problem that has been flagged on the page.
For example, if a page has 7 images, all missing alt tags, it counts as 1 issue.
Category Scores
The category scores shown on a site's dashboard are the average score of the site's pages across that category.
Site Score
A site's score is the average of the category scores, excluding Best Practices.
fromPhoebe:
what criteria makes up the accessibilty score?