General-purpose LLMs do not know your contracts, playbooks, or product specs. RAG (retrieval-augmented generation) feeds the model the right passages at answer time.
Core RAG components
Document ingestion, chunking, embeddings, vector index, retriever, re-ranker, prompt assembly, and citation of sources.
Enterprise requirements
Permission-aware retrieval, PII handling, evaluation of faithfulness, refresh pipelines when docs change, and clear UX for “I don’t know.”
Common failure modes
Junk in the corpus, chunks that are too large or too small, weak retrieval, and no feedback loop from users.
Beyond RAG
For high-volume domain tasks, combine RAG with light fine-tuning and tool-using agents.
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