Appendix C. Simplified Loan Processing System

This appendix brings together the example use cases, diagrams, and actor descriptions for the simplified loan processing system used in the text (Figure C-1). It also includes additional actors and use cases and their descriptions. This appendix contains samples of the following use case artifacts:

• System context diagram

• Descriptions of major actors

• Initial use case diagrams

• Use case diagram showing major use cases and business function packages

• Use case dependency stream and approval process

• Initial use case descriptions with conceptual business objects identified

• Base use case descriptions and diagrams

• Use case description with conditional logic added

• Extend relationships

• Include relationships

• Generalization relationships

• Use case instances

Figure C-1. Context diagram of loan processing system

Major Actors

This section contains a diagram (Figure C-2) and descriptions of key actors in the loan processing system.

Figure C-2. Key actors identified for the loan processing system

Initial Use Case Descriptions

This section contains selected initial use case diagrams (Figure C-3 and C-4) and descriptions for the Loan Processing system.

Figure C-3. Use case diagram for loan submission use cases in the loan processing system

Figure C-4. Use case diagram for ongoing loan management use cases

Initial Use Case Descriptions

Figure C-5 is an initial use case diagram showing key use cases and business function packages. Figure C-6 is an example of use case dependency stream.

Figure C-5. Functional groupings for use cases

Figure C-6. Dependency stream for loan submission and approval

Initial Use Case Descriptions with Conceptual Business Objects Identified

Base Use Case Description

This section contains sample use case diagrams and base use case descriptions for the loan processing system.

Submit Loan Request Use Case

Enter Validated Credit References Use Case

Evaluate Loan Request Use Case

Generate Approval Letter Use Case

Generate Loan Agreement Use Case

Book New Loan Use Case

Generate Standard Payment Notice Use Case

Generate Late Notice Use Case

Figure C-14. Use case diagram for “Generate late notice” use case

Enter Loan Payment Information Use Case

Close Out Loan Use Case

Following is an example of the “Evaluate loan request” use case elaborated with conditional logic.

Use Case Extend Relationships

This section contains sample diagrams and descriptions for several extend relationships.

Sample Extending Use Case Descriptions

Figure C-18. Extending the loan approval process with additional behavior to handle the entering of collateral

Use Case Include Relationships

This section contains sample include relationship diagrams (Figures C-19, C-20, and C-21) and example descriptions.

Figure C-19. “Submit loan request” and “Offer line of credit” including the credit check use case

Figure C-20. Include relationship for “Print the notice”

Figure C-21. Include relationship for “Retrieve loan account”

Sample Include Use Case Descriptions

Generalization Relationships

This section contains sample generalization relationship diagrams and example descriptions (Figures C-22, C-23, and C-24).

Figure C-22. Generalization relationship in “Submit loan request”

Figure C-23. Generalization relationship in “Generate loan report”

Figure C-24. Generalization relationship in “Generate notice”

Use Case Instances for “Submit Loan Request”