This Wiki page is edited by participants of the WCAG Working Group. It does not necessarily represent consensus and it may have incorrect information or information that is not supported by other Working Group participants, WAI, or W3C. It may also have some very useful information.
From WCAG WG
In the 3 December 2013 WCAG meeting the following people were assigned to review failure techniques. Please put your comments for the techniques under the section heading with your name in it.
F1 to F20
F1: Failure of Success Criterion 1.3.2 due to changing the meaning of content by positioning information with CSS
F2: Failure of Success Criterion 1.3.1 due to using changes in text presentation to convey information without using the appropriate markup or text
F3: Failure of Success Criterion 1.1.1 due to using CSS to include images that convey important information
F4: Failure of Success Criterion 2.2.2 due to using text-decoration:blink without a mechanism to stop it in less than five seconds
F7: Failure of Success Criterion 2.2.2 due to an object or applet, such as Java or Flash, that has blinking content without a mechanism to pause the content that blinks for more than five seconds
F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects
F9: Failure of Success Criterion 3.2.5 due to changing the context when the user removes focus from a form element
F10: Failure of Success Criterion 2.1.2 and Conformance Requirement 5 due to combining multiple content formats in a way that traps users inside one format type
F12: Failure of Success Criterion 2.2.5 due to having a session time limit without a mechanism for saving user's input and re-establishing that information upon re-authentication
F13: Failure of Success Criterion 1.1.1 and 1.4.1 due to having a text alternative that does not include information that is conveyed by color differences in the image
F14: Failure of Success Criterion 1.3.3 due to identifying content only by its shape or location
F15: Failure of Success Criterion 4.1.2 due to implementing custom controls that do not use an accessibility API for the technology, or do so incompletely
F16: Failure of Success Criterion 2.2.2 due to including scrolling content where movement is not essential to the activity without also including a mechanism to pause and restart the content
F17: Failure of Success Criterion 1.3.1 and 4.1.1 due to insufficient information in DOM to determine one-to-one relationships (e.g., between labels with same id) in HTML
F19: Failure of Conformance Requirement 1 due to not providing a method for the user to find the alternative conforming version of a non-conforming Web page
F20: Failure of Success Criterion 1.1.1 and 4.1.2 due to not updating text alternatives when changes to non-text content occur
F21 to F40
F39: possible ARIA impact?
F61 to F80
Note from AWK: Peter, can you look at F62, F77, and F17 together? They seem connected.
F82: Do we agree that this is a failure? I'm not sure that I do.
F83: First sentence of description is a bit at odds with the title.
F85: on ARIA Tech TF list
F86: on ARIA Tech TF list
F87: on ARIA Tech TF list
F89: on ARIA Tech TF list
F91: Already includes an ARIA reference. Clarifies the question of whether <td scope="col"> would suffice or not (it is sufficient). Need to clarify procedure #1 from "headers marked up with table header (th) elements, optionally with scope attributes" to "headers marked up with table header (th) elements, including scope attributes unless the table has headers only in the first row or column."
Other Failure Techniques
- F69 Example
- Failure of Success Criterion 1.3.1 due to using elements within data tables that obscure structural relationships
- Failure of Success Criterion 1.3.1 due to not using headers and id attributes to associate data cells to multiple headings
- Failure of Success Criterion 1.3.1 for not correctly marking up table headers
- Failure of Success Criterion 1.3.1 for incorrectly associating table headers and content via the headers and id attributes
- F59 - needs to be updated to not exclude conforming when ARIA used; see  for WG comments
- F38: Failure of Success Criterion 1.1.1 due to omitting the alt-attribute for non-text content used for decorative purposes only in HTML
Also see Category:Failure Techniques.