Your question is Diagnose Delivery Efficiency Drop. 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 are supporting an operations team after a delivery partner says fulfillment efficiency has dropped suddenly. Leadership wants a structured way to separate a real partner performance issue from demand mix changes, internal workflow changes, or data definition problems.
If a delivery partner reports a sudden drop in fulfillment efficiency, how would you diagnose the root cause?