How to Build a Custom RAG System for Your Business Documents – A Step-by-Step Tutorial

1. What Is RAG and Why Your Business Needs It

• Define Retrieval-Augmented Generation (RAG) in plain language: combining document retrieval with LLMs to answer questions based on your own data.
• Explain the core problem RAG solves: eliminating hallucinations and keeping AI responses grounded in your proprietary knowledge base.
• List real-world business use cases: internal knowledge bases, customer support automation, legal document analysis, and sales enablement.

2. Prerequisites and Tech Stack Setup

• Outline required tools: Python 3.10+, OpenAI API key (or any LLM provider), a vector database (ChromaDB or Pinecone), and an embedding model (text-embedding-3-small).
• Walk through environment setup: creating a virtual environment, installing key libraries (LangChain, ChromaDB, openai, pypdf, python-dotenv).
• Provide a ready-to-use `requirements.txt` and a `.env` template for storing API keys securely.