3340chapter07 - MIS 3340 Chapter 7: The Object-Oriented...

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MIS 3340 Chapter 7: The Object-Oriented Approach to Requirements
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7 2 Requirements Diagrams: Traditional and OO Models
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7 3 Object-Oriented Approach Models Description of Events Class diagram – definition of system components Use case diagrams and use case descriptions show user roles and how they use the system Activity diagrams – describe user activities Systems sequence diagrams (SSDs) – define inputs and outputs and sequence of interactions between user and system for a use case
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7 4 The System Activities – A Use Case / Scenario View Use case analysis used to identify and define all business processes that system must support Use Case - single function performed by system for those who use that function Actors Role played by user Outside automation boundary and organization
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7 5 Simple Use Case with an Actor
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7 6 Use Case Diagram Graphical models that summarize information about actors and use cases System developer Looks at system as whole Identifies major uses from event table Identifies functions to be supported by new system Organizes use cases
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7 7 All Use Cases Including Customer
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7 8 Use Case Diagram with System Boundary
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7 9 <<Includes>> Relationships Documents situation where one use case requires
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3340chapter07 - MIS 3340 Chapter 7: The Object-Oriented...

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