Every decision we make affects the way real people experience our products. We've all heard the rallying cry for user-centered design, but even those of us who ascribe to that ideal often fall back on our own biases and instincts when it comes...

Julie Zhuo describes how the development of new features starts at Facebook with three questions: # What people problem are we solving? # How do we know it’s a real problem? # And how will we know if we’ve solved it? Zhuo explains how a...