Netto documented stock-replenishment and POS-settlement flows ahead of supply-chain modernisation.

Netto Marken-Discount, the Edeka-owned discount retailer, operates more than 4,300 stores across Germany on tight discount-retail margins where supply-chain reliability is non-negotiable. Stock replenishment, end-of-day POS settlement, EDI integrations with hundreds of suppliers, and store-back-office reconciliation all depend on a long-running COBOL estate that the operations team had maintained, largely undocumented, for over a decade.

COBOLpro extracted the replenishment logic, settlement chains and EDI integration patterns from source and rebuilt them into reviewed runbooks alongside the operations engineers who had been the de facto documentation. Each runbook ties production behaviour back to an identifiable business rule — replenishment thresholds, settlement edge cases, supplier-specific exceptions.

The reference now backs Netto’s parallel-run migration to a modernised retail platform: the new system can be validated against documented behaviour without freezing day-to-day store operations. Operational change requests are sequenced from the runbooks, and supplier-side surprises are caught against documented integration contracts before they hit the till.