상황
A multi-branch computer retail chain needs a centralized inventory and sales model to track stock per branch, customers, orders, payments, and supplier relationships.
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01
Model inventory as a separate entity linked to both branch and product to capture per-branch stock
02
Use composition for SalesOrder to SalesLineItem to enforce order line ownership
03
Include enumerations for order and payment status to standardize workflow states
Reuse this class diagram as a foundation for retail, e-commerce, or warehouse systems needing integrated sales and inventory management.