RAG Evaluation
Measure what matters with automated metrics
🔑 Key Concepts
- RAGAS framework — Faithfulness (grounded in context?), Answer Relevance, Context Precision, Context Recall. The gold standard.
- Test set — 50-100 question-answer pairs from your docs with expected answers and source chunks.
- Automation — Run evaluation on every pipeline change. If faithfulness drops, you broke something.
- Human calibration — Rate 20 examples manually, compare with automated scores. Use as calibration baseline.
💡 Practice: Try implementing each concept yourself before moving on. Reading about RAG and building RAG are very different things.