![]() ![]() ![]() Just as with component diagrams, these groupings are represented as file folders. Packages: A UML shape that allows you to put different elements into groups. For example, Psycho Killer is outside the scope of occupations in the chainsaw example found below. All use cases outside the box would be considered outside the scope of that system. They outline what a user needs to get done, from that user’s point of view. They’re usually aimed at developers but are intended to be easily understood by everyone on the team, including clients. They are used to depict the functions of a system and the actors involved in. System boundary boxes: A box that sets a system scope to use cases. What is a user story User stories define the who, the what and the why of a product feature. Use case diagrams are usually created at the requirements documentation phase. In complex diagrams, it is important to know which actors are associated with which use cases. A Use Case diagram is a UML diagram that represents the dynamic model of the system and is referred to as a ‘Behavior diagram’ describing the system. Use cases: Horizontally shaped ovals that represent the different uses that a user might have.Īctors: Stick figures that represent the people actually employing the use cases.Īssociations: A line between actors and use cases. ![]() Here are all the shapes you will be able to find in Lucidchart: In the Unified Modeling Language (UML), a use case diagram can summarize the details of your systems users (also known as actors) and their interactions. You can use this guide to learn how to draw a use case diagram if you need a refresher. The notation for a use case diagram is pretty straightforward and doesn't involve as many types of symbols as other UML diagrams. ![]()
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