Some designers find the idea of data-driven design process constraining, but the end result can be that better data can lead to better decision making, which in turn can lead to better user experience.
In this article, Google's Director of User Experience Irene Au discusses data-driven design process at the search giant:
"Search is such a fragile interface. It's humbling to see how the slightest changes in design, just pixel-level changes or barely perceptible changes to colours, can have such a dramatic impact on usage and revenue. At Google, we're in a unique position to measure the impact of design on the business, and we take advantage of that opportunity to make design decisions based on evidence."
The secrets of Google's design team | News | TechRadar UK
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