Use Case Diagram In Case Study

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5.2.4 USE-CASE DIAGRAM A Use-case diagrams are usually referred to as behavior diagrams used to describe a set of actions (use cases) that some system or systems (subject) should or can perform in collaboration with one or more external users of the system (actors). Each use case should provide some observable and valuable result to the actors or other stakeholders of the system. Use-case diagram contains the actor and the use case symbols, along with connection lines. Actors are similar to external entities; they exist outside the system. The term actor refers to a particular role of a user of the system. The main purpose of a use-case diagram is to show what system functions are performed for which actor. Roles of the actors in the system can be depicted. The purposes of use case diagrams can be as follows: • Used to gather requirements of a system. • Used to get an outside view of a system. • Identify external and internal factors influencing the system. • Show the interacting among the …show more content…

They can be used to describe process workflow or the operational workflow of any component in a system. Sometimes for dynamic modeling is not a single, comprehensive chart type is UML available provided, but several special chart types that a modeling under various aspects permit. For the modeling of a process models, which combines the activities of the parties a central role play, the modeling offers through activity diagrams. With this, the flow of each individual block phase with the associated activities and results clearly modeled. The exact description of activities with detailed information of its purpose and the resources involved and people can be given in each case in writing to the clarity of the diagram is not to interfere. Also parallel activities are carried out principally unproblematic. So is the current guiding and pay a documentation as a single, parallel to the development process running activity

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