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. System boundary boxes: A box that sets a system scope to use cases.
In complex diagrams, it is important to know which actors are associated with which use cases. 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. The diagram outlines the various actions and processes involved in the system, enabling users to understand its overall structure and behavior. Here are all the shapes you will be able to find in Lucidchart: The Online Shopping System use case diagram is a visual representation of the key functionalities and interactions within an online shopping platform. 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. In Unified Modeling Language (UML), use case diagrams show how system behavior can change based on user actions.