Usability Guidelines
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  • 1. Useability Guidelines 06/25/08
  • 2. Usability Standards
      • Father: JaKob Nielsen
        • Website: Useit.com
        • Newsletter: http://www.useit.com/alertbox/subscribe.html
      • All usability is based on the application. No such thing as “web specific” usability.
      • Other Consulting groups
        • Nielsen Norman Group: http://www.nngroup.com/
        • Classic System Solutions: http://www.classicsys.com
  • 3. Key Statistics
      • Avg stay for users on a new website = 1 minute and 49 seconds in that time that the website didn't fulfill their needs,users left.
      • For most computing tasks the threshold of frustration is about 10 seconds.
      • Users prefer menus that present at least five no more than 20 links without having to "Scroll".
      • Three-click rule states that users will not stay onsite if it takes more than three clicks to access the information they need. Generally, No need for more than 3 nested levels with 3 to maximal 7 items per level.
    * Source: Yale Institute Web Style Guide 2nd Edition
  • 4. Web Site Structure Tips
      • Logical Structure:
        • Keep a well-balanced and rather shallow than deep hierarchical tree. The directory structure and filenames should reflect the logical structure of a site.
        • Many levels of menus are NOT required to incorporate lots of choices:
  • 5. Web Site Structure Tips
    • 2. Clear Navigation:
        • Always make it easy for the user to identify: Where am I? Where can I go from here? Where did I come from?
        • Common "Site Navigation Systems" (SNS):
          • Navigation Bar: Top or left lists major sections of your site and should be global & static
          • Site Map/Directory : Reflects the structure of your entire site, or the top levels if nesting is too deep
          • Table of Contents: Lists the headings of one document, which could be split across several files.
          • Index: lists clickable keywords of your site, offering the user another form of overview about what you have to offer
          • Search Engine: user to type in the keyword he is searching for.
        • No dead-end pages
  • 6. Web Site Structure Tips
    • 3. Consistent:
      • Website should follow the general navigation and layout conventions of major Web sites because your users will already be used to those conventions.
    • Common footprints for websites:
    • LSD Logo -> Search box -> Directory Sample: google
    • LSN ->D Logo -> Search box -> News -> Dir Sample: Yahoo
    • LSTD Logo -> Search box -> Tabs -> Dir Sample: Amazon
    Logo Search Box Directory
  • 7. Econfig Examples Too Many choices:
  • 8. Econfig Examples Misaligned :
  • 9. Econfig Examples Misaligned :
  • 10. Econfig Examples Inconsistent Placement:
  • 11. Econfig Examples Inconsistent Placement :
  • 12. Industry direction
      • Interactive experience:
        • Java, JavaScript, DHTML, Flash, PHP, Ajax, and other technologies allow application-specific methods such as
          • drawing on the screen,
          • Playing audio,
          • access to the keyboard and mouse.
        • Services have worked to combine all of these into a more familiar interface that adopts the appearance of an operating system and does NOT require page reloading. Example: www.280slides.com
      • GUI Builders: Software tools that simplify the creation of GUIs. These allow designers to arrange widgets using a drag-and-drop editors. Typically XML us used to export GUI builder files. (New Yahoo Site)
  • 13. Samples
    • NEVER require Scrolling: www.ibm.com
    • good indexing Site: www.adobe.com
    • Too Much content: www.qq.com (this was just fun to look at)