![]() As they are discovered, the use cases and the actors should be briefly described. This ensures that the system will turn out to be what the users expected.īoth the actors and the use cases are found by using the requirements of customers and potential users as vital Use cases are developed on theīasis of the actors' needs. Because they represent system users,Īctors help delimit the system and give a clearer picture of what it is supposed to do. The users and any other system that may interact with the system are the actors. Of a use-case model is to communicate the system's behavior to the customer or user. There are many ways to model a system, each of which may serve a different purpose. The diagram below shows a part of a use-case model for the Recycling-Machine System.Ī use-case diagram, showing an example of a use-case model with actors and use cases. Model is the result of the Requirements discipline, and is used as input to Analysis & Design and Test disciplines. Use cases serve as a unifying thread throughout system development. A use-case model is a model of the system's intended functions and its surroundings, and serves as a contract between
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