These include naming standards, directions of arrows, the placing of use cases, usage of system boxes and also proper usage of relationships. They are drawn like the image shown below.Īlthough use case diagrams can be used for various purposes there are some common guidelines you need to follow when drawing use cases. ![]() Similar to class diagrams, packages are used to group together use cases. The package is another optional element that is extremely useful in complex diagrams. Or you can even use it to show the different areas covered in different releases. For example, you can create all the use cases and then use the system object to define the scope covered by your project. This an optional element but useful when you’re visualizing large systems. The system is used to define the scope of the use case and drawn as a rectangle. It’s drawn as an oval and named with the function. ![]() This could be a person, organization or an external system and usually drawn like skeleton shown below.Ī use case represents a function or an action within the system.
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