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Is use case narrative part of the UML?

Is use case narrative part of the UML?

A textual description of the business event and how the user will interact with the system to accomplish the task.

Solution

  • First of all, UML means Unified Modelling Language. It is a language which helps in designing and modelling software systems. So use case is not a part of UML. UML is a tool that helps to represent Use Cases (Among other things). And Use Case Modelling is an approach in requirement engineering for understanding and describing the functional requirements of a System.

    It can be both narrative and graphical. Textual representation part is called use case specification while the graphical representation part is called Use case diagram. enter image description here

    So what is a use case?
    A use case is a summary of scenarios for a single task or a goal like "pay bill" in the above image. And a Use case model typically consists of several use cases. It helps to provide a clear picture about the external actors (both users and external systems),the functional requirements of the system and the relationships among them which in turn leads to a better design.