Software Engineering Lecture #5

Reuse and Extension An Example Notes of the animations (highlight all the points) 1. Cellular Network 2. User 3. Place Phone call 4. Receive phone call 5. Use scheduler 5. Place conference call 6. Receive additional call 7. extend -- written at the top 8. extend -- written at the bottom

Extended User An Example Notes of the animations Show all the slide and then scroll to the customer and individual customer and corporate customer ----- Zoom to these objects. (highlight text and arrow color) 1. Customer 2. Individual customer – with its arrow going towards the customer 2. Corporate Customer -- with its arrow going towards the customer

Components Of A Use Case Priority Actor Summary Precondition Post- Condition Extend Normal Course of Events Alternative Path Exception Assumption

Use Case Example Delete Information

Use Case Example Delete Information

Use Case Example Delete Information

Use Case Example Delete Information

Activity Diagram Animation sequence is on the slide. Use arrow for animation If it does not fit on one slide then u can use the scrolling feature. Take care show at least three levels at a time (not less in any case and then use the highlight feature.)

Activity Diagram

Activity Diagram

Activity Diagram

Limitation of Use Cases Usability: Color blind people should not have any difficulty in using the system – color coding should take care of common forms of color blindness. Reliability: The system needs to support 7 x 24 operation Performance: Authorization should be completed within 1 minute 90% of the time. Average authorization confirmation time should not exceed 30 seconds. Portability: The system should run on Windows 98 and above as well as Sun Solaris 7.0 and above. Access: System should be accessible over the internet – hidden requirement – security.