Retail ERP/CRM Functional Blueprint

I need a clear, detailed blueprint that captures every feature and day-to-day workflow we will expect from a new ERP/CRM platform tailored to a retail business. The scope centres on three core capabilities—inventory management, customer relationship management, and sales tracking—mapped to the real-world duties of our store managers, sales staff, and warehouse team. What I need from you is a concise yet comprehensive document (PDF or editable doc) that: • Describes all required modules, screens, and data fields, showing exactly how the system will handle stock movements, customer interactions, and point-of-sale or online sales records. • Illustrates process flows in BPMN, UML, or a similar diagramming style so developers can see step-by-step how each user group should move through the system. • Lists integration touchpoints with common retail peripherals (barcode scanners, receipt printers, e-commerce storefronts) and any APIs we may rely on. • Highlights permission levels per role, outlining what store managers, sales staff, and warehouse staff can view or edit. • Provides acceptance criteria—clear, testable statements that will later help us confirm the platform meets its purpose. I will supply branding guidelines, sample SKUs, and any legacy reports you might need. You will deliver the finished specification plus source diagrams so we can adapt them later. If you’ve drafted functional specs for Odoo, ERPNext, SAP Business One, or similar retail solutions, let me know: that experience will help us move faster. I’m ready to start immediately and can answer questions quickly so the first working draft lands within a week.