Software engineering - system flow chart

The basic contents of the system flow chart

The basic contents of the system flow chart are as follows .
(1) Use graphic symbols to Black box Formal description of each component in the system （ for example ： Program 、 file 、 database 、 Hardware device 、 Artificial process, etc ).
(2) use “→” Indicates the flow of information between the various components of the system （ Don't mistake “→” Represents the information processing and control process ).

Symbols of system flow diagram

An example of a system flowchart

Take the management of a library as an example , Explain the use of the system flow chart .
example 2.2 A library lending process is shown in the figure 2.2 Shown , Readers must be verified before entering the inquiry room . Readers can find the books they need in the inquiry room by checking the book card or using the terminal to search the book database . Find the books you need and fill in the book request form. Then go to the service desk to borrow books . If there are any books left , The administrator will fill out the loan form , Take the books out of the storeroom and give them to the readers . Pictured 2.2 The system flowchart shown in describes the overview of the above system . Each symbol in the diagram defines a component that makes up the system , It does not specify the specific working process of each component . The arrows in the figure specify the flow path of information in the system .

  For complex systems , A good method is to describe the system hierarchically . 

  Course selection system flow chart of educational administration system