Your question is Prototype to Production Success. 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).
How do you determine when a prototype is successful and build it with production in mind?
Keep your answer focused on how you would define success, validate it, and transition from prototype to a reliable production system. Address both product metrics and engineering constraints.