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5 Cards in this Set
- Front
- Back
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What is Use Case Diagram? |
1. To show representation of system 2. To understand the system before building or modifying 3. Use case shows interaction between the system and its environment 4. To shows overview of functional requirement 5. To serve as a basis for testing |
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Use Case Diagram Overview |
1. It is a picture that describe - how actors relate to use cases - how use case relate to use case 2. Diagram are helpful but it doesnt explain the full information 3. Textual description is essential |
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Purpose of Use Case Diagram |
1. To specify system context 2. To capture system requirement 3. To validate system architecture 4. To drive implememtation and generate test cases 5. To identify the classes required |
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Use Cases Element |
Actor 1. Represent a user role or another interacting system 2. Can be human, machine, system 3. Represented by stick figure Use Case 1. External view of the system that provide action user might perform to complete a task 2. Function for business purpose 3. Represent by an eclipse Use Case Description 1. Text description 2. Brief description, 3 word max 3. In or out of the use case eclipse Boundary 1. The dividing line between the system and the environment 2. Use cases in boundary 3. Actors outside boundary 4. Represent as a box Relationship 1. Association - Indicate communication,not data flow - Solid lines 2. Generalization - Represent a specialized use case to a more generalized one - General are higher, arrow to me 3. <<Include>> - Including another use case to accomplish functionality - To break bigger part of use cases - dashed arrow, arrow from me 4. <<extend>> - if a use case is optional - to add extra functionality under certain circumstances - dashed arrow, arrow to me
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Use Case Scenario Template |
1. Use Case(name) 2. Description 3. Used By, actors 4. Preconditions 5. Main Scenario - From User - From System 6. Alternatives 7. Exceptional |
