The Object Diagram can help unwind what the state of the system might look like in a specific scenario.

Note1:

Objects as they might appear during a single cash sale scenario.

Diagram Node Summary
aPOS_ui	Object
aProdDM	Object
aSale	Object
aSaleDM	Object
details	Object
server	Object

All Outgoing Links
Associates	to Object aProdDM Label: look-up
Associates	to Object aSale Label: creates
Dependency	to Class POSFrame (in Package Diagram user_interface)

All Outgoing Links
Aggregates	to Object details Supplier Role: items
Associates	to Object aSaleDM Supplier Role: db svcs
Dependency	to Class CashSale (in Package Diagram problem_domain)

All Outgoing Links
Dependency	to Class SaleDM (in Package Diagram data_management)

All Outgoing Links
Dependency	to Class CashSaleDetail (in Package Diagram problem_domain)

State:	READY
active

All Outgoing Links
Associates	to Object aProdDM Label: creates
Associates	to Object aSaleDM Label: creates