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Use Cases - heracleia.uta.edu

Use CasesUse Cases in Iterative Development CSE 5324, Summer 2017 Outline What and Why? Major Elements of a Use case Guidelines for Writing Use Cases Use case Diagrams Use case -Driven DevelopmentCSE 5324, Summer 2017, Ali Sharifara UTA2 Use- case What it is: Text storyWidely used to discover and record (mostly functional) requirements What is it about: Some actor(s)using a system to meet specific goals Answering questions: Who is using the system, whatare their typical scenarios of use, and what are their goals? What it is NOT: Not object-oriented Not a diagram UML use Cases diagrams are secondary-value artifacts Focus: use Cases , not use case diagrams CSE 5324, Summer 2017, Ali Sharifara3 Example: Point of Sale 1. Customer arrivesat a checkout (+goods)2. Cashier usesPOS system to record items 3. System presentsa running total and line-item details. 4. Customer enterspayment information, which the system validates and System updatesinventory.

• May optionally include a UML use case diagram – Use cases, actors, and their relationships – context diagram CSE 5324, Summer 2017, Ali Sharifara 7. System Context diagram - Example • A system context diagram (SCD) is a diagram that defines the

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Transcription of Use Cases - heracleia.uta.edu

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www.se.rit.edu

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