Stage 1 — Ingestion: Documents arrive via file upload, email attachment, API endpoint, or watched folder. Each document is classified by type (invoice, contract, email, receipt) using a lightweight ML classifier. Unsupported formats are flagged for manual review.
Stage 2 — Preprocessing: Scanned documents go through OCR (Tesseract for standard, Google Document AI for complex layouts). Digital PDFs are parsed directly. Tables, headers, and sections are identified using layout analysis. Multi-page documents are processed with page-level context.
Stage 3 — Extraction: GPT-4o or Claude extracts structured data using field-specific prompts. For invoices: vendor, amount, line items, tax, due date, currency. Each field includes a confidence score (0-1). Low-confidence extractions are flagged for human review.
Stage 4 — Validation: Extracted data passes through validation rules: date format checks, amount calculations (line items sum to total), vendor matching against known database, duplicate detection. Invalid records are queued for correction.
Stage 5 — Integration: Validated data is pushed to your target system (ERP, CRM, accounting software) via API. Confirmation receipts are generated. Processing metrics (documents per hour, accuracy rate, rejection rate) are logged to the monitoring dashboard.