What is the difference between a designer and an engineer as far as service beacons go?

So designers are the guys that are coming up with all the work for these guys to do, really, and making these guys' lives hard. We come up with a system, how we want it to work, the rule set behind it, the conditions that we want the system to operate in, and then we ask these guys to go and implement it in the game code, backend services, and then they give it back to us for us to kind of tune and make it all kind of work at the end of the day.

An important part of that process is where we tell you that you're actually wrong about something.