留学生辅导 SENG201 project.

Software Engineering I
Activity – Use Case diagrams
– Computer Science and Software Engineering Department

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• Understand the software requirements elicitation and specification activity.
• Use UML use case diagrams to represent requirements.
• Use wireframes to sketch the UI.

Understanding use case diagrams
• Objective:
– To identify what not to do when creating a use case diagram.
– Point out mistakes in the diagrams.
• Wrong extended actor.
• Incorrect associations.
• Extend/Include misunderstanding.
• Use cases that do not represent actions.

Use Case Diagram Relationships Explained with Examples

What is wrong in this diagram?
http://www.agilemodeling.com/artifacts/useCaseDiagram.htm

What is wrong in this diagram?
http://www.agilemodeling.com/artifacts/useCaseDiagram.htm

What is wrong in this diagram?
http://www.agilemodeling.com/artifacts/useCaseDiagram.htm

What is wrong in this diagram?
https://softwareengineering.stackexchange.com/questions/359486/how-to-model-two-step-login-in-uml-via-use-cases-and-sequence-diagrams-properly

What is wrong in this diagram?
http://www.agilemodeling.com/artifacts/useCaseDiagram.htm

What is wrong in this diagram?
By Kishorekumar 62, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7880320

Understanding use case diagrams
• Objective:
– To determine the scope of your SENG201 project.
1. In groups, briefly discuss the project specification.
• What are the main features of your future system?
2. Complete the use case diagram for your SENG201 project.

Understanding use case diagrams
3. Monster Fighter
4. include
5. Go to sleep
6. Show number of monsters
7. View team’s properties
8. Purchase items
9. Enemy player
10. Steal a monster
12. Create a player
13. Upgrade a monster
14. extend
15. Visit the shop
16. Heal a monster

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