ingenious visual marketing + substantial coding = quantum success  
 
Usability Testing

How do we really use the web? When it comes down to it, we don't have time to muddle our way through masses of information. We've learned, "If it's short, it's more likely to be used." Web Usability is not about good or bad design; it is about effective use of the site by your users, internal and external. A lot of designers for the web think in terms of a paper brochure, read systematically from front to back in an orderly fashion. Unfortunately, this does not translate to the Internet and how people use it. Online we tend to scan pages, as if we are reading a billboard going 60 miles per hour.

The usability of your site's design is one of the biggest keys to your online success. The way to ensuring your site is usable is to test and test frequently, starting early in the design and development process. Testing is not just following your Use Cases and making sure everything works as prescribed. It is putting the site in front of people who don't know your business or a person from another department who has never seen the site before. By seeing how others see your site, you learn two things. The first, others don't see things the way you do, and second, are they able to use the site and find the information they need easily.
  5 Usability Principles
  1. if something requires a large investment of time, or looks like it will, it's less likely to be used

  2. we don't read pages, we scan them

  3. we don't make optimal choices, we satisfice

  4. we don't figure out how things work, we muddle through

  5. focus groups are not usability testing

Source: Don't Make Me Think! A Common Sense Approach to Web Usability ©2000 Steve Krug, Circle.com Library