The seven principles of Universal Design were developed by the Working Group for Architects, Product Designers, Engineers and Environmental Researchers of 1997, led by Ronaldo Maceo at the State University of North Carolina.
The purpose of these principles is to direct the design to environments, products and communication. NCSU's Universal Design Center can apply the principles of "evaluating existing designs, accompanying the design process, and informing designers and consumers about the characteristics of products and most usable environments."
This design is useful and can be sold to people with different skills. For example, a website designed to be accessible to anyone, including people who are blind and use screen reader technology, use this principle.
Flexibility in use
Design covers a wide range of individual preferences and abilities. An example is a museum that allows visitors to read or hear a description of the screen.
Simple and intuitive
The design is easy to understand, independent of user experience, knowledge, language skills or current concentration. Significant scientific devices with clear and intuitive controls are an example of the application of this principle.
Design effectively communicates the required information with the user, regardless of the environment or user sensitivity. An example of this principle is a television program designed in a high bar for sports.
Tolerance through error
The project minimizes the risk and the harmful consequences of accidental or unintentional actions. An example of a product that applies this principle is a software application that provides guidance when a user selects improperly.
Inadequate physical effort
The design can be utilized comfortably and with minimal fatigue. The doors, which are automatically opened for persons with a large number of physical properties, show the application of this principle.
Size and space for access and use
For access, range, manipulation and use, regardless of body size, body size or user mobility, appropriate size and space are provided. A flexible work space designed for the use of left or right employees and a number of other physical features and abilities is an example of the application of this principle.