DATA FLOW DIAGRAM

DFD Level 1: Banking Transaction Processing

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UPDATED 2026-06-27
EXAMPLEDFD Level 1: Banking Transaction Processing
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CASE ANALYSIS

Scenario

A bank's transaction processing system receives transactions from customers, validates them, checks balances, processes payments, updates accounts, and generates receipts.

Key decisions

  • Transaction validation before processing
  • Balance check decision point
  • Data stores for account and transaction records

When to reuse this

When designing or documenting a banking transaction processing system's data flow at the system level.

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