CASE STUDY
AI-Powered Invoice Processing and PO Automation
An enterprise Document AI platform combining Azure OCR, OpenAI validation, and Dynamics 365 Business Central integration — processing 500+ daily supplier invoices for a 50-store pharmacy retail chain.
Cognic AP Engine
Search supplier invoices…
Daily Supplier Invoice & Reverse PO Processing
500+
Daily Invoices
700
Active Suppliers
96.2%
Extraction Accuracy
18 Mins
Avg Turnaround
| Invoice # | Supplier Name | Store Target | Total Amount | Line Items | Confidence |
|---|---|---|---|---|---|
| INV-98210 | McKesson Pharmaceutical | Store #12 – Boston | $18,420.50 | Matched to Receipt | 99% |
| INV-44120 | AmerisourceBergen | Store #04 – Queens | $32,150.00 | Matched to Receipt | 97% |
| INV-77312 | Cardinal Health | Store #28 – Philadelphia | $9,840.25 | Matched to Receipt | 98% |
| INV-10934 | Bausch Health Supply | Store #45 – Atlanta | $4,320.00 | Price Variance Flag | 89% |
| INV-65421 | Johnson Medical Direct | Store #08 – Manhattan | $14,900.00 | Matched to Receipt | 96% |
500+ Daily Invoice Throughput
Automated line-item parsing across 700 diverse pharmaceutical suppliers
75% Faster Cycle Turnaround
Invoices matched and reverse POs generated in minutes instead of days
50 Stores Multi-Location Network
Direct delivery matching for individual pharmacy branches
96.2% Extraction Accuracy
Deep learning vision models parsing degraded carbon copies and complex tables
What is AI-powered invoice and PO automation?
AI-powered invoice and PO automation combines intelligent optical character recognition (OCR), large language model (LLM) field extraction, and ERP integration to digitize supplier invoices, validate line items against warehouse receiving logs, create reverse purchase orders, and post matched vouchers to Microsoft Dynamics 365 Business Central.
A Smarter Way to Process Supplier Invoices
The Challenge
500+ daily invoices from 700 suppliers arriving in PDFs, paper scans, and carbon copies requiring manual data entry and line-by-line verification.
The Solution
Multi-modal Document AI pipeline extracting line items, prices, and taxes with automated 3-way matching against store goods receipts.
The Outcome
Reverse POs created automatically in Business Central, 75% faster invoice approval, and complete supplier dispute prevention.
The Challenge
High-volume pharmacy and retail chains handle thousands of weekly vendor deliveries where manual AP entry causes severe backlogs, payment delays, and missed supplier discounts.
500+ daily invoices from roughly 700 diverse suppliers
Unstructured invoice formats: digital PDFs, skewed scans, and multi-part carbon copies
Line-by-line manual creation of reverse POs in Dynamics 365 Business Central
Tedious comparison of unit prices, quantities, and sales tax against store receipts
High risk of pricing discrepancies and duplicate billing going unnoticed
Store staff spending hours scanning and keying invoice data instead of assisting customers
Backlogs preventing timely capture of early-payment supplier discounts
Lack of centralized audit tracking between invoice documents and ERP ledger vouchers
Traditional Manual AP Processing vs. Cognic Document AI Workflow
| Workflow Stage | Traditional Manual Workflow | Cognic AI-Powered Engine |
|---|---|---|
| Document Intake | Manual sorting of paper mail, scanning store receipts, and downloading email attachments | Unified intake via dedicated AP email inbox, scanner webhooks, and mobile capture portal |
| Data Extraction | AP clerks manually typing invoice numbers, line items, NDC codes, and totals into ERP | Azure Document AI + OpenAI extracting header, line-item tables, and tax details in seconds |
| 3-Way Matching | Paper invoices manually compared against receiving slips and vendor price books | Automated 3-way matching comparing invoice prices and quantities against ERP store receipts |
| Reverse PO Creation | Manual creation of Purchase Orders in Business Central for direct-store deliveries | Automated generation and posting of reverse POs and Purchase Invoices via Business Central APIs |
| Exception Handling | Price discrepancies flagged via email, causing invoice approval delays | Interactive AP Workbench with confidence scoring, side-by-side PDF preview, and 1-click overrides |
| Audit & Archiving | Paper invoices filed in physical folders or disconnected local network drives | Secure cloud archive linking original invoice PDFs directly to Business Central purchase records |
The Cognic Invoice & PO Automation Engine
Three integrated modules transforming supplier paper into approved ERP vouchers.
01
Multi-Modal Document AI & OCR
Processes high-variety supplier invoices including degraded carbon copies and tilted scans.
• Azure Document Intelligence OCR
• LLM-powered semantic parsing
• Table and line-item extraction
→
02
3-Way Matching & Anomaly Detection
Validates line items against store goods receipts, unit costs, and tax rules.
• Automated 3-way matching
• Pricing variance detection
• Duplicate invoice screening
→
03
Business Central Integration & AP Workbench
Generates reverse POs and purchase vouchers directly in Microsoft Dynamics 365.
• Dynamics 365 Business Central API
• Interactive AP Exception Workbench
• Automated GL account coding
→
AP Review
Side-by-side verification with confidence scoring
Reverse POs
Auto-created Purchase Orders in Business Central
ERP Sync
Approved vouchers ready for scheduled payment runs
Platform Architecture & Processing Pipeline
An enterprise-grade, resilient document processing pipeline built for 50-store pharmacy scale.
1 Multi-Channel Intake
› AP Email Webhooks
› Store Mobile Scanners
› Supplier Portal
› Bulk PDF Uploads
› Azure Blob Storage
2 Document AI Engine
› Azure Document Intelligence
› OpenAI Semantic Parser
› Line-Item Table Extraction
› NDC / SKU Normalization
› Confidence Evaluation
3 Matching & Rules
› 3-Way Match Verification
› Store Delivery Receipt Match
› Price Tolerance Rules
› Tax Code Validation
› Duplicate Screening
4 ERP Posting & Archive
› Business Central API
› Reverse PO Generation
› Purchase Invoice Creation
› Audit Log Storage
› Power BI AP Dashboards
Traceable Audit Chain: From Supplier Document to Paid ERP Voucher
Every line item tracked from raw document image to posted General Ledger journal.
Supplier Invoice
→
Document AI
→
Store Receipt
→
3-Way Match
→
AP Approval
→
Business Central PO
Document AI & Automation Layer
Cutting-edge AI models specialized for complex pharmaceutical and retail invoices.
Deep Learning Vision OCR
Accurately reads carbon copies, dot-matrix printouts, and multi-page tables
OpenAI Schema Normalizer
Standardizes disparate supplier formats into structured JSON data
Automated 3-Way Matcher
Cross-references invoice line items against goods receiving records
Pricing Variance Engine
Flags unapproved price increases and tax rate mismatches
Automated ERP Journal Generator
Posts approved vouchers and reverse purchase orders via REST APIs
Accounts Payable Exception Workbench
Review interface for accounts payable teams and store controllers.
| Invoice # | Supplier Name | Store | Amount | Flag | Confidence | Action |
|---|---|---|---|---|---|---|
| INV-98210 | McKesson Pharma | Store #12 – Boston | $18,420.50 | Matched to Receipt | 99% | |
| INV-44120 | AmerisourceBergen | Store #04 – Queens | $32,150.00 | Matched to Receipt | 97% | |
| INV-77312 | Cardinal Health | Store #28 – Philly | $9,840.25 | Matched to Receipt | 98% | |
| INV-10934 | Bausch Health Supply | Store #45 – Atlanta | $4,320.00 | Price Variance Flag | 89% |
Enterprise Data Security & Compliance
Secure, high-availability architecture protecting supplier and pricing information.
Private VPC
Encrypted Storage
Role-Based Access
Immutable Audit Trail
Zero Retention LLM
SOC 2 Ready
Technology Stack
Key technologies powering the production deployment.
Azure Document AI
OpenAI GPT-4o
Dynamics 365 BC
PostgreSQL
FastAPI
React UI
Python Engine
Docker
Power BI
Azure Blob Storage
What Changed
Key operational and efficiency improvements.
Processed 500+ daily invoices across 50 pharmacy retail stores
Automated reverse PO creation directly in Business Central
Eliminated manual typing of line-item descriptions and prices
AP approval cycle accelerated by 75%, capturing early pay discounts
Complete digital archive linking invoice scans directly to ERP records
Built for Retail AP & Operations
Empowering multi-location retail chains to scale operations seamlessly.
Accounts Payable Managers
Eliminate invoice backlogs and ensure on-time vendor payments.
Retail Store Managers
Free store personnel from manual scanning and invoice verification.
Chief Financial Officers
Gain real-time visibility into supplier spending, liabilities, and margins.