상황
This DFD Level 1 models the online bookstore's order processing pipeline, from customer order placement to shipment notification, incorporating inventory checks and payment authorization.
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01
Decompose system into Receive Order, Validate Order, Process Payment, and Ship Order processes
02
Separate Inventory Update as a downstream process triggered post-shipment
03
Use dedicated data stores for Orders and Inventory, with external entities for Customer, Payment Gateway, and Warehouse
When analyzing data flows in an e-commerce order management system, designing functional decomposition, or documenting system interfaces for development.