1. Corpus and freshness
- Who owns source documents, and how do updates reach the index?
- Are access controls preserved through chunking and retrieval?
- Do you know stale-data failure modes for your domain?
2. Retrieval quality
- Golden questions with expected passages — not only vibe checks.
- Hybrid search when keywords and semantics both matter.
- Citation UX so users (and auditors) can verify answers.
3. Generation and safety
- Clear “I don’t know” behavior when retrieval is weak.
- Prompt and tool boundaries for regulated domains (health, finance).
- Latency and cost budgets under realistic concurrency.
4. Evaluation and monitoring
- Offline eval set plus online feedback loop.
- Logging of queries, retrieved docs, and refusals (with privacy review).
- Owner on-call when quality drifts after a content or model change.
5. Ownership
If nobody owns corpus freshness, retrieval quality, and incident response, you do not have a production RAG system — you have a demo with a longer timeout.