Sonae’s custom point-of-sale (POS) system, designed around SAP’s Enterprise Resource Planning (ERP) software, offers the flexibility and manageability necessary to track, manage, and account for thousands of inventory items and transactions across all retail outlets However, testing this complex and highly customized system proved to be extremely challenging. While the client could automate some component tests, critical system testing still relied on manual methods. Additionally, the testing capacity would soon be surpassed by the rapid evolution of the company’s transaction models