Software system architecture designer concise tutorial | software system modeling

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Software system modeling

The modeling process of software system is ：

The physical system corresponding to the existing system , Form a physical model through modeling , Then form a logical model through abstraction , Then form the logical model of the new system through adjustment and optimization , Then form a physical model through instantiation , Finally, a physical model is formed through concretion , Here's the picture ：

among , The logical model corresponds to the requirement analysis , The physical model corresponds to the software design .

Structured modeling method

Structured modeling method is a process centered Technology , It can be used to analyze an existing system and define the business requirements of a new system .

The model drawn by structured modeling method is called data flow graph （Data Flow Diagram,DFD） .

DFD From the perspective of data transmission and processing , Use graphic symbols to describe each... In the system by subdividing layer by layer