1: Principle one: Equitable Use
The design is useful and marketable to people with diverse abilities
- Provide the same means of use for all users: identical whenever possible; equivalent when not.
- Avoid segregating or stigmatizing any users
- Provisions for privacy, security and safety should be equally available to all users
- Make the design appealing to all users
2: Principle Two: Flexibility in Use
The design accommodates a wide range of individual preferences and abilities.
- Provide choice in methods of use
- Accommodate right-or left-handed access and use
- Facilitate the user’s accuracy and precision
- Provide adaptability to the user’s pace
3: Principle Three: simple and intuitive
Use of the design is easy to understand, regardless of the user’s experience, knowledge, language skills or current concentration level.
- Eliminate unnecessary complexity
- Be consistent with user expectations and intuition
- Accommodate a wide range of literacy ang language skills
- Arrange information consistent with its importance
- Provide effective prompting and feedback during and after task completion
4: Principle Four: perceptible information
The design communicates necessary information effectively to the user, regardless of ambient Conditions or the user’s sensory abilities.
- Use different modes (pictorial, verbal, tactile) for redundant presentation of essential information.
- Provide adequate contrast between essential information and its surroundings
- Maximize “legibility” of essential information
- Differentiate elements in ways that can be described (i.e., make it easy to give instructions or directions)
- Provide compatibility with a variety of techniques or devices used by people with sensory limitations.
5: Principle Five: Tolerance for error
The design minimizes hazards and the adverse consequences of accidential of unintended actions.
- Arrange element to minimize hazards and errors: most used elements, most accessible: hazardous element eliminated, isolated or shielded.
- Provide warnings of hazards and errors
- Provide fail safe features
- Dicourage unconscious action in tasks that require vigilance
6: Principle Six: low physical effort the design can be used efficiently and comfortably and with a minimum of fatigue.
- Allow user to maintain a neutral body position
- Use reasonable operating forces
- Minimize repetitive actions
- Minimize sustained physical effort
7: Principle Seven: size and space for approach and use
Appropriate size and space is provide for approach, reach, manipulation and use regardless of user’s body size, posture or mobility.
- Provide a clear line of sight to important element for any seated or standing user.
- Make reach to all components comfortable for any seated or standing user.
- Accommodate variations in hard and grip size
- Provide adequate space for the use of assistive devices or personal assistance.