Traditional Culture Encyclopedia - Traditional stories - What is a data flow chart and what role does it play in system analysis?
What is a data flow chart and what role does it play in system analysis?
It is the main tool that can comprehensively describe the data flow of the system and the logical model of the information system. It uses a set of symbols to describe the whole picture of information in the whole system, and comprehensively reflects the flow, processing and storage of information in the system. Data flow diagram has two characteristics: abstraction and generality. System components include external entities, processing, data storage and data flow in the system.
Functions of data flow chart:
Convenient for users to express functional requirements and data requirements and their relationship; It is convenient for two types of personnel to understand the framework of the existing system and planning system; Clearly express the situation of data flow; Conducive to system modeling.
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