the desired results is a waste of time and thought. Because of that we don't care enough to understand what we are doing as long as we can use the functions. The effect of that is that users may develop unexpected thinking patterns and ways of using a website - differently than it was intended. Thus, it is important to test each website and its usability. Usability Testing and Improvement Usability testing is evaluating the different components of web usability (learnability, efficiency, memorability, errors and satisfaction) by watching the users accomplishing their task. Usability testing allows to uncover the roadblocks and errors users encounter while accomplishing a task. However, testing is not a one time event but rather an ongoing process. In order to test a web site, we need to have ways of measurement in place. We need to analyze the data gathered and make a plan of improvements, which will be implemented later. After a successful implementation the site needs to be tested again and the process should be repeated again. Evaluation Methods As more results of usability research become available, this leads to the development of methodologies for enhancing web usability. There are a number of usability testing tools available in the market. Usability testing Heuristic evaluation Cognitive walkthrough Web analytics International Usability Testing E-commerce In the context of e-commerce websites, the meaning of web-usability is narrowed down to efficiency: triggering sales and/or performing other transactions valuable to the business. Web usability received renewed attention as many early e-commerce websites started failing in 2000. Whereas fancy graphical design had been regarded as indispensable for a successful e-business application during the emergence of internet in the 1990s, web-usability protagonists said quite the reverse was true. They advocated the KISS principle (keep it simple, stupid), which had proven to be effective in focusing end-user attention. See also Eye tracking, a fast and accurate usability tool Multivariate testing, a statistical testing of user responses Jakob Nielsen (usability consultant) Web development Web navigation References External links Usability.gov—usability basics with focus on web usability Evaluating Web Sites for Accessibility—accessibility is a crucial subset of usability for people with disabilities. This W3C/WAI suite includes a section on involving users in testing for accessibility. Usability News from the Software Usability Research Laboratory at Wichita State University Usability Web design pl:Użyteczność (informatyka)