Development Process Behind the Scenes

1. Development ProcessBehind the Scenes Jane Gao Administrative Computing Services

2. Agenda • Use Case Driven Analysis • Iterative & Incremental Development • Rational Unified Process (RUP) Model • Q & A

3. Goals of System Analysis • System must conform to the needs of the users. • Simplifies and provides a better understanding of the system from a user’s perspective. • Improves communications between users and developers. • Saves time.

4. What is UseCase? • A Use Case is a typical interaction between a user and system that enables the user to perform a required task or achieve a specific goal.

5. UseCaseElements (I) • Actor • Who will interact with the system • Use Case • Interaction between user and the system • Association Relationship • The relationships between an actor and a use case. • The arrow indicates who initiates the communications.

6. UseCaseElements (II) • Includes Relationship • Allows one use case to use the functionality provided by another use case. • Extends Relationship • Allows one use case the option to extend the functionality provided by another use case.

7. UseCaseElements (III) • Generalization Relationship • Shows that several actors or use cases have some commonality.

8. Timesheet Use Case Capture • Actor • Employee, supervisor, and payroll system. • Goals of employee • Create, submit, update, query timesheet. • Goals of supervisor • Approve timesheet and generate report.

9. Timesheet Use Case List • Use Cases • Employee creates a new timesheet. • Employee updates existing timesheet. • Employee submits timesheet. • Employee inquires leave balance. • Supervisor approves or un-approves timesheet. • Supervisor generates reports. • …

10. Describe a Use Case (I) • Use Case Name :Approve Timesheet • Actor:Supervisor • Goal:Supervisor approves submitted timesheets. • Pre-conditions:Login,Submitted Timesheet • Post-condition:Post Timesheet to PPS. • Success Conditions:Approved. • Failure Conditions:Passed the due date.

11. Describe a Use Case (II) • Flow of activities (Approve Timesheet ): • Business rules

12. Timesheet Use Cases Diagram

13. Timesheet Use Cases (revised)

14. Prioritize the Use Cases • Create Timesheet • Submit Timesheet • Approve Timesheet • Login • Update Timesheet • Release Timesheet to Queue • Generate Reports • Query Leave Balance • View Timesheet • Logout • Post timesheet to Payroll system

15. Identify Iterations • Iterations • A complete development loop resulting in a release of an executable product. Iteration 1: Create Timesheet, Submit Timesheet Iteration 2: Approve Timesheet Iteration 3: Login, Update Timesheet Iteration #: ….. • Check the performance, scalability, security and reliability in every iteration.

16. Develop Iteratively

17. Benefits Of An Iterative Approach • Risks are mitigated earlier. • Change is more manageable. • Higher level of reuse. • Project team can learn along the way. • Better overall quality.

18. Rational Unified Process (RUP) Model

19. Summary • Use Case Modeling • Lay out application functions in a Use Case diagram, use it as a roadmap. • Iterative & Incremental development • Analyze a little, design a little, test a little, and loop back.

20. Q & A Thank You ! Jane Gao Administrative Computing Services University of California, Irvine 949-824-8671 jane@uci.edu