Reference · Glossary
Recall@k
Whether the **correct chunk appears in the top k** retrieved results — retrieval quality before generation.
When to use
RAG audits and index tuning — before blaming the LLM.
When not
As the only metric — a retrieved chunk still needs faithful citation.
Example
Golden query needs doc `policy-2024` in top-5 hits → recall@5 = 1 if present.