1: Principle one: Equitable Use

The design is useful and marketable to people with diverse abilities

GUIDELINES

• 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.

GUIDELINES

• 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.

GUIDELINES

• 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.

GUIDELINES

• 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.

GUIDELINES

• 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.

GUIDELINES

• 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.

GUIDELINES

• 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.