Industrial organizations often have the right answer somewhere in a repository and still cannot find it quickly.
What RAG changes
RAG combines a language model with controlled retrieval so answers are grounded in approved documents rather than the model pretending it knows the plant.
Why versioning matters
Maintenance manuals, SOPs and validation documents change. Document identity, revision and effective date belong in the retrieval design.
Minimum controls
Use approved sources, retain references, reject stale versions, respect access controls and make unsupported answers explicit.
What good looks like
A useful answer points back to the procedure, revision and relevant section instead of producing an impressive but untraceable paragraph.
Final takeaway
The engineering value comes from a measurable improvement, explicit boundaries and a design that remains understandable when the system is under pressure.