Differentiate elements in ways that can be described (i.e., make it easy to give instructions or directions). Maximize "legibility" of essential information. Provide adequate contrast between essential information and its surroundings. Use different modes (pictorial, verbal, tactile) for redundant presentation of essential information. The design communicates necessary information effectively to the user, regardless of ambient conditions or the user's sensory abilities. Provide effective prompting and feedback during and after task completion. Arrange information consistent with its importance. Accommodate a wide range of literacy and language skills.
Be consistent with user expectations and intuition. Use of the design is easy to understand, regardless of the user's experience, knowledge, language skills, or current concentration level. Facilitate the user's accuracy and precision. Accommodate right- or left-handed access and use. The design accommodates a wide range of individual preferences and abilities. Provisions for privacy, security, and safety should be equally available to all users. Avoid segregating or stigmatizing any users. Provide the same means of use for all users: identical whenever possible equivalent when not.
The design is useful and marketable to people with diverse abilities. Principle 7: Size and Space for Approach and Use.According to the Center for Universal Design in NCSU, the Principles "may be applied to evaluate existing designs, guide the design process and educate both designers and consumers about the characteristics of more usable products and environments." The 7 Principles of Universal Design were developed in 1997 by a working group of architects, product designers, engineers and environmental design researchers, led by the late Ronald Mace in the North Carolina State University.The purpose of the Principles is to guide the design of environments, products and communications.
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