Test Retrieval Before Tuning RAG Answers


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Posted by ML_Systems_hix on September 06, 2026 at 01:37:38:

In Reply to: Гостевые дома на берегу Ладоги posted by OLNSer on May 13, 2026 at 12:43:28:

RAG evaluation should separate retrieval failure from generation failure. If the right passage never reaches the model, prompt changes can improve tone without fixing the answer. Start with a small evaluation set that identifies the expected source for each query.

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During testing, record which document chunks were retrieved and whether their metadata matched the intended access rules. A correct answer from an unauthorized document is still a system failure. Tune chunking or ranking only after the failed cases are classified, then evaluate how the model responds when retrieval returns weak or conflicting evidence.



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