Collecting data about design is easy in the digital world. We no longer have to conduct in-person experiments to track pedestrians’ behavior in an airport terminal or the movement of eyeballs across a page. New digital technologies allow us to easily measure almost anything, and apps, social media platforms, websites, and email programs come with built-in tools to track data.
And, as of late, data-driven design has become increasingly popular. As a designer, you no longer need to convince your clients of your design’s “elegance,” “simplicity,” or “beauty.” Instead of those subjective measures, you can give them data: click-through and abandonment rates, statistics on the number of installs, retention and referral counts, user paths, cohort analyses, A/B comparisons, and countless other analytical riches.
After you’ve mesmerized your clients with numbers, you can draw a few graphs on a whiteboard and begin claiming causalities. Those bad numbers? They’re showing up because of what you told the client was wrong with the old design. And the good numbers? They’re showing up because of the new and improved design.
But what if it’s not because of the design? What if it’s just a coincidence?
There are two problems with the present trend toward data-driven design: using the wrong data, and using data at the wrong time.