I'm a Googler working on something else, but I think the rough process will be the same: 1. Product management decides which audiences should get special atten

I'm a Googler working on something else, but I think the rough process will be the same: 1. Product management decides which audiences should get special attention. 2. UX researchers get hold of a number of users matching those audiences. Interview them what are their pain points with the product and observe them stumble through a bunch of critical journeys. 3. UX designers design how that should go instead. 4. Eng (including UI) design how to make that happen. 5. The design doc goes through approvals from all the above, but also legal, security, privacy and other stakeholders. After that, it's a simple matter of programming.