The scenario
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.
What is in this drawing
Read the decisions behind it.
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.
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