Data Flow

E-Commerce Checkout: Level-1 Process Breakdown

Data Flow Diagrams (DFD) · made in Skemio

Level-1 DFD showing customer order validation, payment processor authorization, inventory database deduction, and receipt issuing.
Level-1 DFD showing customer order validation, payment processor authorization, inventory database deduction, and receipt issuing.
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What it shows

  • Inventory checks must reserve stock before charging customer cards.
  • Payment authorization and settlement should decouple from record saves.
  • Receipt generation should read committed order stores asynchronously.

The takeaway

Order processing integrity depends on sequencing stock holds before charging cards.

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