Your question is Choose Switchback for Marketplace Dispatch. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You work on a two-sided marketplace where the dispatch algorithm matches demand to nearby supply in real time. Your team has built a new dispatch policy that is expected to improve completed orders by reducing assignment latency, but you are worried that standard user-level A/B randomization could contaminate results because drivers and customers interact in the same shared market. You need to decide whether to run a standard A/B test or a switchback test, and design the experiment so the result is credible enough to ship.
How would you decide between a switchback test and a standard A/B test here, and how would you design, power, and analyze the experiment so that the ship decision is valid despite interference risk?
