Nielsen Norman Group Report:
105 pages PDF format
Download your copy of the report right now (from
esellerate):
Single-user license: $56
Site license: $126 (allows you to make unlimited
copies within your company)
No shipping/handling fees will be added: it's a download.
Summary
Users go to site maps if they are lost, frustrated, or looking for specific details on a crowded site. A site map's main benefit is to give users an overview of the site's areas in a single glance by dedicating an entire page to a visualization of the information architecture. If designed well, this overview can include several levels of hierarchy, and yet not get so big that users lose their ability to grasp the map as a whole.
This report is based on usability research with real users and the way they use real site maps. It contains 28 design guidelines that will make site maps easier to use and make websites and intranets easier to navigate.
The guidelines are based on usability tests of the following sites and their site maps: CDNOW, Documentum, Interwoven, Mercedes Benz USA, Museum of Modern Art, New Jersey Transit, Novell, Salon, Siemens Medical Solutions Health Services Corporation, and the United States Treasury Department.
The report also contains examples, screenshots, and user comments for 13 additional site maps that the test participants encountered in their own web browsing, but which were not studied as systematically as the sites listed above.
Richly illustrated with 56 color screenshots of site maps and design elements that worked and didn't work. The report also contains drawings made by the test users to visualize their understanding of the information architectures after using the site maps.
105-page report by Amy Stover Schade, Kara Pernice Coyne, and Jakob Nielsen
Running a similar usability study yourself to collect comparative design lessons from a large number of websites would cost about $70,000.
Please help us continue publishing low-price reports by buying a site license if you have colleagues who will read the report. If you only need it for yourself, then that's obviously what the single-user license is for. If somebody "gives" you a copy, then please buy a download anyway to keep prices down in the future.