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In software and systems engineering, a use case is a potential scenario in which a system receives an external request (such as user input) and responds to it. A use case is a list of actions or event steps typically defining the interactions between a role (known in the Unified Modeling Language (UML) as an actor) and a system to achieve a goal.
A use case diagram [1] is a graphical depiction of a user's possible interactions with a system. A use case diagram shows various use cases and different types of users the system has and will often be accompanied by other types of diagrams as well. The use cases are represented by either circles or ellipses. The actors are often shown as stick ...
Use case analysis is a technique used to identify the requirements of a system (normally associated with software/process design) and the information used to both define processes used and classes (which are a collection of actors and processes) which will be used both in the use case diagram and the overall use case in the development or redesign of a software system or program.
Use Case diagrams represent a set of Use Cases, which are textual descriptions of how an actor achieves the goal of a use case. for Example Customer Places Order. ArchiMate : ArchiMate is an open and independent enterprise architecture modeling language to support the description, analysis and visualization of architecture within and across ...
Use case points (UCP or UCPs) is a ... Description Weight Assigned Value ... For the Online Shopping System example, 28 man hours per use case point will be used.
Use case flows describe sequences of interactions, and may be worded in terms of a formal model. A use case is intended to provide sufficient detail for it to be understood on its own. Template As a <type of user>, I can <some goal> so that <some reason>. [20] Title: "goal the use case is trying to satisfy" Main Success Scenario: numbered list ...
Use cases are then used as basis for drafting the UI concept (which can contain for example main views of the software, some textual explanations about the views and logical flows), these are short stories that explain how the end user starts and completes a specific task, but not about how to implement it.
A general attitude towards software isn't a use-case, it's a persona or personality. An example of a use-case would be somebody using an auto-teller machine to see their bank balance. Another example of a different use-case is somebody using that same auto-teller machine to withdraw money. A use-case is a single example of a use of a system.