UML sequence diagram

Sequence Diagram(SequenceDigoal)

A sequence diagram is a time series interaction diagram that emphasizes messages. It consists ( Actor ), Object ( Object ), Message ( Message ), Lifeline ( Lifeline ) And control focus ( Focus of control .

Sequence diagrams are mainly used to display the interaction between objects in a series of order of interaction..The sequence diagram shows how different Business Objects interact, which is useful for communicating with the current business. In addition to recording the current events of an organization, a business-level sequence chart can be used as a requirement file to meet future system transfer requirements. In the project demand phase, analysts can bring the use cases to the next level by providing a more formal expression. In that case, use cases are often refined into one or more sequence diagrams..

one of the main purposes of a sequence chart is converts the needs expressed in use cases into further and more formal expressions. use cases are often divided into one or more sequence diagrams. In addition to the purpose of designing a new system, sequence diagrams can also be used to record an existing system (called " heritage " . This document is useful when you hand over the system to another person or organization.

To create a sequence chart, follow these steps:

(1)Search for objects;

(2)Search for activists;

(3)Add messages to the graph.

 

The following is an example of another person: