Onwa Don Supermarket's integrated inventory and sales system orchestrates four distinct operational phases: customer transactions, supplier procurement, management reporting, and store operations. The system routes customer purchases through Phase 1, manages supplier orders via Phase 2, delivers business intelligence to managers in Phase 3, and coordinates storekeeper and cashier activities in Phase 4. This multi-phase architecture ensures real-time inventory visibility, streamlined procurement workflows, and actionable reporting for retail decision-makers. Fork this diagram on Diagrams.so to customize actor roles, add payment gateways, or extend reporting dashboards for your retail operation. The sequence design demonstrates how a centralized system synchronizes customer-facing, supply-chain, management, and operational workflows.