Universal design is the process of creating products that are accessible to people with a wide range of abilities, disabilities, and other characteristics. Universally designed products accommodate individual preferences and abilities; communicate necessary information effectively (regardless of ambient conditions or the user's sensory abilities); and can be approached, reached, manipulated, and used regardless of the individual's body size, posture, or mobility. Application of universal design principles minimizes the need for assistive technology, results in products compatible with assistive technology, and makes products more usable by everyone, not just people with disabilities.
From University of Washington, "What is universal design?" Click here to view the page.
Universal design often coincides with general principles of good design. Be clear, be concise, be considerate. The Center for Universal Design outlines the following principles as key to universal design (click here to view the full report):
PRINCIPLE ONE: Equitable Use
The design is useful and marketable to people with diverse abilities.
Guidelines:
PRINCIPLE TWO: Flexibility in Use
The design accommodates a wide range of individual preferences and abilities.
Guidelines:
PRINCIPLE THREE: Simple and Intuitive Use
Use of the design is easy to understand, regardless of the user's experience, knowledge, language skills, or current concentration level.
Guidelines:
PRINCIPLE FOUR: Perceptible Information
The design communicates necessary information effectively to the user, regardless of ambient conditions or the user's sensory abilities.
Guidelines:
PRINCIPLE FIVE: Tolerance for Error
The design minimizes hazards and the adverse consequences of accidental or unintended actions.
Guidelines:
PRINCIPLE SIX: Low Physical Effort
The design can be used efficiently and comfortably and with a minimum of fatigue.
Guidelines:
PRINCIPLE SEVEN: Size and Space for Approach and Use
Appropriate size and space is provided for approach, reach, manipulation, and use regardless of user's body size, posture, or mobility.
Guidelines:
CAST (formerly the Center for Applied Special Technology) provides the following "in a nutshell" document of universal design considerations:
WebAIM (Web Accessibility in Mind) outlines a number of considerations when it comes to presenting information online:
The World Wide Web Consortium (W3C) offers similar resources, including a decision tree on how best to use images and text in conjunction and a thorough set of accessibility guidelines: