Use Case chart -- usecase di #

I have been learning UML for a while. Next I will talk about the use case diagram in UML in conjunction with the data room charging system.

The use case diagram is used to describe the user's needs, describe the system's functions from the user's perspective, and point out the executors of each function, emphasizing who is using the system and what functions the system performs for the performer. The main function of modeling is to express the functional requirements or behaviors of the system.

The use case diagram consists of actors, use cases, and Association. It describes each use case of the use case diagram using the Rose tool.

Is the example diagram I summarized:

(Large definition)

The following is an example of the data center billing system I have drawn. There must be a lot of unreasonable paintings. I hope you can give valuable comments.

Average user

Operator

Administrator

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