SYSTEMSDESIGNANALYSIS 1 OO: Chapter 4 Process Modeling Jerry Post Copyright © 1997

SYSTEMSDESIGN 2 Use-Case  Ch. 5 Section 7 client operator Support representative Help Desk Make a call Take the call Do research Return a call

SYSTEMSDESIGN 3 Library Example Library Member Borrow Books Get interlibrary loan Return books Do research Read books, news Purchase supplies Circulation clerk Supplier

SYSTEMSDESIGN 4 Library Details: Use Case Borrow Books Get interlibrary loan Return book Do research Read books, news Purchase supplies Check library card Member Circulation clerk Supplier extends uses

SYSTEMSDESIGN 5 Use Case Hints  Getting started  Identify the actors, look for roles, generalization  Look for transactions  Extends association  A process similar to a base, generic process, but handled differently.  Interlibrary loan.  Uses association  If several processes have sub flows in common, create a new process and use it by association.  Check library card.  Guidelines  For each actor, find tasks and functions that they perform with the system.  Name the use cases (use verbs).  Level of detail?  Goal is to show an abstract picture of the system processes.  Use packages (collection of subsystems) if needed.

SYSTEMSDESIGN 6 Unified Modeling Language (UML)  Design Tools  Standardized  New: 1998  Object-Oriented  Programming/Detail  Can be used for business modeling  Use Case  Collaboration  Sequence Charts  Standard  Rose  Booch, Rumbaugh, Jakobson  CASE tools, automated design  Rational Rose  Stirling: IEF, etc.

SYSTEMSDESIGN 7 Sequence Charts CallerExchangeReceiverTalk Off hook Dial tone Dial number Ring tone Off hook On hook Book: time