Summary: The average business metrics improvement after a usability redesign is now 83%. This is substantially less than 6 years ago, but ROI remains high because usability is still cheap relative to gains. Six years ago, we conducted a survey of design projects and found that, after redesigning for usability, the average improvement in key performance indicators (KPI) was 135%. We've recently com
![Usability ROI Declining, But Still Strong](https://cdn-ak-scissors.b.st-hatena.com/image/square/bd559d3ba08d430e59d4deb4131ec07ec2c71496/height=288;version=1;width=512/https%3A%2F%2Fmedia.nngroup.com%2Fmedia%2Farticles%2Fopengraph_images%2FSlide06articlesusability-roi-declining-but-still-strong.png)