- From: David MacDonald <david100@sympatico.ca>
- Date: Thu, 28 Feb 2019 06:08:14 -0500
- To: Bruce Bailey <Bailey@access-board.gov>
- Cc: Silver TF <public-silver@w3.org>
- Message-ID: <CAAdDpDbRgpkNLUp4h1PDmbVXeV-cVT42x=Uo8P7zMzaQJY_k4Q@mail.gmail.com>
Two additional factors that went into the decision of what level to choose were: - Did it require AT? The Level A SCs generally didn't require a user to purchase Assistive Technology (i.e. magnification) - Did it impact the look or feel of the website, and cause redesign? Level A generally doesn't require a change to the look or feel of the site. We've always been careful not to create hard and fast rules about when something was Level A or AA and have stuck with "The Success Criteria were assigned to one of the three levels of conformance by the working group after taking into consideration a wide range of interacting issues." Cheers, David MacDonald *Can**Adapt* *Solutions Inc.* Tel: 613-806-9005 LinkedIn <http://www.linkedin.com/in/davidmacdonald100> twitter.com/davidmacd GitHub <https://github.com/DavidMacDonald> www.Can-Adapt.com <http://www.can-adapt.com/> * Adapting the web to all users* * Including those with disabilities* If you are not the intended recipient, please review our privacy policy <http://www.davidmacd.com/disclaimer.html> On Tue, Feb 26, 2019 at 10:59 AM Bruce Bailey <Bailey@access-board.gov> wrote: > On the call today it came up that, in the context of litigation, it was > not clear enough to lawyers how success criteria were assigned to the > different levels. > > The most authoritative explanation is from Understanding Level of > Conformance: > http://www.w3.org/TR/UNDERSTANDING-WCAG20/conformance.html#uc-levels-head > > See the five bullet list following these two sentences: > The Success Criteria were assigned to one of the three levels of > conformance by the working group after taking into consideration a wide > range of interacting issues. Some of the common factors evaluated when > setting the level included... > > The assignment of levels was the subject of much discussion as the Working > Group developed 2.1. That consensus was posted in the wiki, please see: > > http://www.w3.org/WAI/GL/wiki/WCAG_2.1_Success_Criteria#Initial_Suggestion_for_Priority_Level > > As part of that effort, I did an analysis (that has *not* been fully > vetted by the working group) of the 2.0 against the five bullet points > mentioned above. See the discussion tab of that page: > http://www.w3.org/WAI/GL/wiki/Talk:WCAG_2.1_Success_Criteria > > What I found is that: > WCAG 2.0 Level A SC (generally) are two-out-of-three for easy, essential, > or invisible -- 21 of 25 Level A SC are characterized this way. > WCAG 2.0 Level AAA SC (generally) are not possible for all content -- 21 > of 24 Level AAA SC are characterized this way. > That leaves AA SC (generally) as the remainder. The more detailed tally > is at the bottom of that wiki page: > http://www.w3.org/WAI/GL/wiki/WCAG_2.1_Success_Criteria#Observations > > > > > > > > >
Received on Thursday, 28 February 2019 11:08:47 UTC