Your question is Troubleshooting 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; how did you troubleshoot it?
Be specific about the symptoms, business or user impact, and how you separated data, modeling, deployment, and monitoring issues. Explain how you prioritized the investigation, collaborated with stakeholders, communicated uncertainty, and measured whether your corrective action worked.