Deep command of the core domains, general ledger and AR/AP, inventory and supply chain, procurement, and order-to-cash, and a solid understanding of how the leading platforms (SAP, NetSuite, Oracle) model them, so what we build reflects proven patterns rather than reinventing them. Define the KPIs that measure operational and financial health, inventory accuracy, DSO, DPO, close time, and cost to serve, report on them to leadership monthly, and keep users aware of deliverables and updates as they ship.