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T11_tutorialUML - Reviewing UML(Sequence Diagram A...

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Chapter 6 - Requirements Discovery 1 1 Reviewing UML (Sequence Diagram) A Guideline and Examples MIE350: Tutorial Fall 2008 2 UML Diagrams
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Chapter 6 - Requirements Discovery 2 3 UML Diagrams Class diagrams represent static information and relationships Statecharts represent dynamic information inside an object Sequence diagrams represent dynamic relationships among objects 4 Sequence Diagrams Depicts a sequence of actions that occur in a system Captures invoked methods of objects, and order of invocation Represents dynamic behaviour of system Often used to model the way one use case is realized through a sequence of messages between objects. Can be used in system analysis and design efforts – In analysis phase is more on system level – On design phase is more like an implementation
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Chapter 6 - Requirements Discovery 3 5 Sequence Diagrams How do a set of objects get together to perform some functionality? Sequence diagrams represent a succession of interactions between objects over time Usually only represent one scenario within a single sequence chart – Anything more gets confusing for one diagram How many use cases are involved in Seq. diagram? How many use cases are involved in statetransition diagram?
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