The Open Accessibility Testing Methods for Experts And Layfolk were created with two goals in mind.
Ensure consistent accessibility testing across eBay
Make detailed accessibility testing methods available to everyone; not just accessibility experts
Issue Priorities from P1 (most severe) to P4 (least severe) are given to issues found via OATMEAL tests.
Since eBay strives for conformance with the Web Content Accessibility Guidelines to Level AA, most OATMEAL methods will test to this standard.