In software and systems engineering, a use case is a list of actions or event steps, typically defining the uc. Tool for drawing use case and other UML diagrams.

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You can create a UML use case diagram in Visio to summarize how users (or actors) interact with a system, such as a software application. An actor can be a  UMLet - Free UML Tools for fast UML diagrams UMLet is a free, open-source UML tool with a simple user interface: draw UML diagrams fast, build sequence and activity diagrams from plain text, export 

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Drawing Use Case Diagrams. Figure 1 shows what the above use case might look like in UML schematic form. The use case itself is draws as an oval.

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UML Use Case Diagram: Tutorial with Example What is the Use Case Diagram? Use Case diagrams are defined as diagrams that capture the system's functionality and requirements in UML. Use-cases are the core concepts of Unified Modelling language m use case diagram draw