Demonstrate ROI. In this approach, you gather and analyze data to prove that a usability change you've made resulted in cost savings or additional revenue {"Changing the label on this button increased sales by 0.25%"}. There's an excellent book about it: Cost-justifying Usability: An Update for the Internet Age, edited by Randolph Bias and Deborah Mayhew.
( Steve Krug )
[ Don't Make Me Think, ]
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