Research and testing make designs better by improving ease of use, reducing friction, and identifying changes to include in your next design sprint.

But you don’t have time to test every design decision.

We asked designers and researchers for the questions they use to determine whether or not to test.

What’s included?

• A designer-approved checklist to help prioritize the right research on the right projects

• When you have to test — no excuses

• When you can feel confident relying on best practices and assumptions