Measuring RAG Quality: Precision, Recall, NDCG

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The concept A RAG system can fail in several ways that a single ‘accuracy’ number will hide. Retrieval can miss the gold passage (recall problem). Retrieval can return the right passage and the model can still ignore it, contradict it, or cite the wrong id (grounding problem). The model can refuse when the passage did contain the answer (over-refusal). The……

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