When answering this question, it's important to demonstrate your ability to use data and analytics to evaluate the effectiveness of your design work. Here's an example response:
"In my previous role as a UX designer, I was responsible for redesigning the checkout process for an e-commerce website. To measure the success of the redesign, I used Google Analytics to track key metrics such as cart abandonment rate, conversion rate, and time spent on the checkout page. I also conducted user testing to gather feedback on the new design and incorporated that feedback into my analysis.
Using this data, I was able to determine that the new checkout process led to a 15% increase in conversion rate and a 10% decrease in cart abandonment rate. Additionally, users spent less time on the checkout page, indicating that the new design was more intuitive and streamlined. Overall, the redesign was a success, and I was able to demonstrate the impact of my design work using data and analytics."
By sharing a specific example of how you've used data and analytics to measure the success of your design project, you'll show the interviewer that you're capable of using both qualitative and quantitative methods to evaluate your work.