Model Evaluation & Trade-offs

Summary

Interviewers probe whether you can choose the right metric for a business problem, not just compute one — expect 'what metric would you use and why' questions.

• 1Practice justifying a metric choice for several different business scenarios.
• 2Be ready to discuss precision/recall trade-offs with concrete cost implications.
• 3Prepare a story about a time a model looked good on one metric but failed in practice.