From 62% to 94% RAG Accuracy: The 5 Architecture Changes That Actually Moved the Needle

We measured baseline accuracy across a production RAG system: 62%. Six weeks later, after five architecture changes and zero model changes: 94%. Here's exactly what we changed, why each one mattered, and what the numbers looked like before and after each step. The Setup Internal knowledge assistant for a mid-market company. Knowledge spread across Confluence, Google Drive, and SharePoint, approximately 4,200 documents total. Users asking natural language questions about internal policies, proces