Your question is Diagnosing Production Model Failures. 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).
Describe a situation where a model you deployed failed to meet performance expectations in production. How did you diagnose and resolve the issue? Be specific about the symptoms, your role, the investigation, and how you balanced restoring service with identifying the underlying cause. Explain how you communicated the issue, measured the resolution, and prevented a recurrence.