The challenge
NOS processes tens of thousands of supplier invoices per month. Each one required operators to extract data, match it against purchase orders in SAP, validate business rules, and handle every exception by hand. The workflow spans multiple supplier systems, invoice formats, and business entities across subsidiaries, with more than 20 fields to validate per invoice. When mismatches occurred, operators investigated manually, often without clear visibility into why an invoice had failed or how frequently that pattern was appearing across the pipeline. There was no consolidated view of blocking reasons, no systematic way to prioritise exceptions, and no way to measure whether process changes were reducing failure rates over time.
