Buttons or navigational tools are absent or confusing. Screens are difficult to navigate, but some buttons and navigational tools work. Users can navigate a few screens. Screens contain adequate navigational tools and buttons. Users can progress through screens in a logical path to find information.
Screens contain all necessary navigational tools and buttons.
Users can progress intuitively through screens in a logical path to find information. No video, audio, or 3-D enhancements are present or use of these tools is inappropriate. Limited video, audio, or 3-D enhancements are present. In most instances, use of these tools is appropriate. Some Video, audio, or 3-D enhancements are used appropriately to entice users to learn and to enrich the experience.