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Return on Investment for Usability
Through an extensive study, Jakob Nielsen found that usability redesigns increase usability by 135% on average, while intranets improve slightly less.

Based on data from 863 design projects and findings from other studies, Nielsen concludes that current best practice call for devoting about 10% of a projectís budget to usability.

He also found that the cost of usability doesnít increase linearly with project size. A project thatís ten times bigger, for example, typically requires only four times more usability spending.

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The article Return on Investment for Usability

Henrik Olsen | January 09, 2003 | Via Jakob Nielsen's Alertbox Announcement List

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