Your question is Debugging Production Data Pipelines. 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're responsible for a production data pipeline, and something starts going wrong after it has been running normally. You need a clear way to isolate the issue, limit downstream impact, and restore confidence in the data before making broader changes.
How do you approach debugging issues in production systems?