RAG pilots fail when the sources are not ready
Dev.to / 6/4/2026
💬 OpinionSignals & Early TrendsIdeas & Deep AnalysisTools & Practical Usage
Key Points
- RAG pilot failures are often caused by problems in the source documents (e.g., duplicates, stale files, contradictions, missing ownership, and incorrect permissions) rather than the underlying model or LLM setup.
- Before selecting embeddings, chunking, rerankers, or agent tooling, teams should verify the source layer’s authority, update cadence, citation traceability, and which questions must be refused or escalated.
- A key safety principle is that a system admitting it “does not know” is usually safer than one that confidently merges multiple outdated or conflicting documents.
- For a small pilot to be considered successful, it should demonstrate that retrieval finds the right source, answers remain grounded in sources, citations are inspectable, and unsupported questions are refused or escalated.
- If these conditions fail, the recommended next step is source cleanup plus improved evaluation questions and refusal/escalation criteria, and the article provides planning/evaluation resources (a readiness review and evaluation kit) to assess this before larger investment.
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