![]() Use case diagrams use a specific notation, which ensures that there is no ambiguity in what you’re trying to convey. ![]() A function may be described using the verb/noun rule, such as ‘record customer’. A function may be defined as a set of actions that the business users want the IT system to support in order to achieve a specific goal.įor example, the use case diagram may provide a depiction of a customer account system with the various functions that the business users want the system to support in order to achieve a specific goal. Use case diagrams are used to depict the functions of a system and the actors involved in using those functions. A use case diagram can be used to show the top-level view of a business system and are used to show the things that need to be provided at an organisational, business system or IT system level. ![]()
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