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Soft Exam System Architect Concise Tutorial | Case Analysis | Requirement Analysis

2022-07-30 10:10:00 【Wanmao Society】

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Data Flow Diagram

Data Flow Diagram (DFD), from the perspective of data transmission and processing, uses graphical symbols to describe the function of each component in the system and the transmission of data between them by using graphical symbols to illustrate the system.completed function.

Elements of a data flow diagram

DFD includes: Data Streaming, Processing, Data Storage (Files), External Entities.

elementDescriptionLegend
Data flowConsists of a fixed set of data&#
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