It can be easy to forget that users don’t come in a standard format when designing products. We’re getting better at catering for different personas or demographics but the industry still lags a long way behind design that is accessible to as many disabled people as possible.
The principle of “Design for All” is one that begins with the Seven Principles of Universal Design. These were founded at North Carolina State University back in 1997 by a team of design specialists across multiple disciplines which was headed by Ronald Mace. The Seven Principles help designers evaluate the effectiveness of their designs to be used by as many people as possible.
Is your design going to be useful to a wide range of people; including those with different physical and mental capacities from your test users? Can it be marketed to those people with different capacities?
When your design is put into use; can it be used in many different ways? Will adapt to the way one person wants to use it or has to use it because of differing abilities?
Author/Copyright holder: Toxel.com. Copyright terms and licence: All rights reservedImg source
Simple and Intuitive Use
How easy is your design for someone to pick up and start using immediately without instruction? The easier it is for someone to use irrespective of their previous skills, experiences or learning and irrespective of their ability to concentrate for long periods of time; the easier it will be for a wide-range of user to use it.
Does your design give the user enough information to make the most efficient use of your product? Is this true in all conditions?
Author/Copyright holder: Norges Blindeforbund. Copyright terms and licence: CC BY-NC-ND 2.0
Have you tried to make your design “foolproof”? In that, no matter how it is used, there are minimal errors and minimal consequences for those errors? This is vital for those with differing abilities; they may make mistakes compared to other users but they should not be unduly inconvenience for those mistakes either.
Minimal Physical Effort
Has your design tried to minimize the physical effort needed to get the best use from your product? Have you tried to keep motions that may cause fatigue in the user to a minimum?