Invoice extraction pipeline for Meridian Partners
LLM-based extraction of line items from invoices in any layout, with validation and human review. A case study by Arjun Patel, AI Engineer — Chatbots & Document AI.
Challenge
Meridian Partners, a management consulting firm, typed thousands of supplier invoices into their accounting system every month. Template-based OCR broke whenever a supplier changed layout.
Solution
I built a pipeline combining OCR, a vision-capable language model with a strict JSON schema, arithmetic and supplier validation, and a review queue for low-confidence fields.