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Users should be considered throughout the website design process. Usability should not be an afterthought. Testing and fixing a website after it has been built is inefficient and unlikely to produce good results. The best approach to take is to incorporate a model of pervasive usability into your design and production process (Foraker Design 2005).
Brinck et al. (2001) have proposed an issue to pervasive usability on the website, called Pervasive Usability Process (PUP), come to carry on the assessment and analysis of relevant research.
Pervasive Usability (PU) advocates the application of methods to evaluate a design’s usability at every stage of the design process, keeping in mind the goals of the project and the users' needs, and stands out from other usability testing methods as it can be conducted throughout the product’s lifecycle, not just in the preliminary development stages. It’s also unique because the steps involved in this method are quite simple, and can be less taxing on those conducting the test (Suneet, 2003).
- Tom Brinck, Darren Gergle, and Scott D. Wood (2001). Usability for the Web: designing web sites that work. Morgan Kaufmann. pp. 12–35.