RAG Architecture Design

Answers grounded in your own documents β€” with the receipts.

An LLM that 'remembers' will eventually lie to you. RAG makes it look things up first β€” retrieving the right passages from your knowledge and answering only from them, with citations. Current, private, and verifiable.

  • Every answer cited
  • No invented facts
  • Stays current automatically

Retrieval-augmented generation

β€œWhat’s our refund window for enterprise?”

Retriever Β· your knowledge base

policy.pdfwikiticketsspecs

β€œEnterprise refunds are within 30 days.”

cited Β· policy.pdf p.4

80 β†’ 3.5

hrs per report, grounded by RAG

Cited

every claim traces to a source

Hybrid

semantic + keyword retrieval

Fresh

re-indexed as docs change

What a real RAG system needs

Retrieval is the part that makes generation trustworthy

A vector database is 10% of it. These four pieces are what make RAG accurate enough to depend on.

Ingestion & chunking

Per-source pipelines for PDFs, wikis, tickets and databases β€” parsed, cleaned and chunked so retrieval actually works.

Hybrid retrieval

Semantic vector search plus keyword and re-ranking, so the right passage surfaces even when the question is worded differently.

Grounded generation

Answers constrained to retrieved context, every claim cited, with an honest 'not found' instead of a confident invention.

Evaluation & freshness

Grounding and citation-coverage metrics, plus index re-sync so answers stay current as your documents change.

How we build RAG

From a pile of documents to a cited answer

Each step exists to protect one thing: that the answer is grounded in your truth and you can prove where it came from.

  1. 1

    Index your knowledge

    Connect and ingest your document sources, then chunk and embed them into a retrieval store built for your content.

  2. 2

    Tune retrieval

    Hybrid search and re-ranking tuned on real questions, so the passages the model sees are the right ones.

  3. 3

    Ground & cite

    Constrain generation to retrieved context and attach citations, so every answer is checkable back to a source.

  4. 4

    Evaluate & keep fresh

    Measure grounding and accuracy, set up re-indexing, and monitor so quality holds as the corpus grows.

RAG, in production

Northbridge: grounded reports, no invented numbers

A consultancy spent 80 hours hand-building each client report. We used retrieval-grounded generation to draft narrative tied to the actual figures β€” every number traceable to its source β€” so analysts edit instead of assemble.

Northbridge Advisory

Internal product / tooling team at a consultancy Β· EU

Professional Services Β· Internal Tooling
Time to produce a client report23Γ— faster
Before
80 hrs
After
3.5 hrs
Report throughput23Γ— throughput
Before
manual baseline
After
23Γ—
Clients served per analystmore clients, no new hires
Before
capped by reporting
After
more, same team
3.5 hrs

Per report (was 80)

23Γ—

Throughput

100%

On-brand, grounded output

Same

Headcount, more clients

β€œThe report used to be where our best thinking went to die under formatting. Now the tool hands an analyst a grounded draft and they spend the day on the insight. We took on more clients without taking on more people.”
β€” Partner, Northbridge Advisory
PythonRAG / vector DBAzure OpenAIReactHeadless PDF renderRead the full case study

Straight answers

RAG architecture questions

What is RAG, in plain terms?

Retrieval-augmented generation. Instead of trusting the model to remember, the system first retrieves the relevant passages from your documents, then asks the model to answer using only those passages β€” and cite them. It's how you get current, private, verifiable answers instead of confident guesses.

Why not just fine-tune the model on our documents?

Fine-tuning bakes knowledge in at training time, so it goes stale and can't cite sources. RAG keeps knowledge in a live index you can update instantly, and every answer points back to the document it came from. For knowledge that changes or needs to be auditable, RAG wins; often we combine both.

How do you stop it from inventing facts?

Answers are constrained to the retrieved passages, every claim carries a citation, and the system is built to say 'not found in the documents' rather than fill the gap. We evaluate grounding and citation coverage as first-class metrics.

Our documents are messy β€” PDFs, wikis, tickets. Can RAG handle that?

Yes β€” handling the mess is most of the engineering. We build ingestion and chunking per source type, normalise it, and use hybrid retrieval (semantic + keyword) so the right passage surfaces even when the wording differs.

How do we keep answers current as documents change?

The index re-syncs on a schedule or on change events, so new and updated documents are searchable quickly. No retraining, no stale answers β€” update the source and the system reflects it.

Make your AI answer from your truth.

Point us at your documents and the questions you need answered. We'll design a RAG approach and prove the grounding on a real sample.

2000+ vetted engineers Β· 3 global hubs Β· 98% client retention

Contact Us

for project discussion

Once you fill out this form, our sales representatives will contact you within 24 hours.

2000+
Talents Vetted
3+
International Offices
100+
Project Delivered
50%-70%
Average Cost Saving

Got a project in mind?

We guarantee to get back to you within a business day.