Cost-Justifying Usability, 2nd Edition

The next two levels, described as Universal accessibility, require access device

testing and user testing. Some access devices that should be tested are screen

readers, screen magnifiers, and keyboard-only access. Because these often

require additional training, resources, and costs, they are appropriate for those

organizations that can set aside an explicit budget for accessibility endeavors.

While they can be done without first applying the guidelines, it’s best to apply

the guidelines first to avoid learning about problems that could be found more

easily and inexpensively and fixed using the guidelines. The guidelines also

provide broader, though shallower ...