Process Sale Scenario using SSD Diagram

Questions and Answers

Initiating and finalizing sales and entering item details

It can occur multiple times, with the system responding with item description and total.

EndSale()

Change due and receipt Signup and view all the answers

It highlights only the input and output events between the actors and the system. Signup and view all the answers

An abstraction of acknowledging the request without a return value Signup and view all the answers

Study Notes

All systems are treated as a black box in SSD.
The diagram focuses on events that cross the system boundary from actors to systems.

The scenario involves a Cashier interacting with a system to process a sale.
The Cashier is represented as a stick figure, and the System is represented as a black box.

MakeNewSale() event: The Cashier starts a new sale, and the System acknowledges the request without returning a value.
EnterItem(itemID, quantity) event:
- The Cashier enters an item, its ID, and quantity.
- The System responds with the item's description and total.
- This event can occur multiple times.
EndSale() event:
- The Cashier ends the sale.
- The System responds with the total with taxes.
- This event does not have a return value.
MakePayment(amount) event:
- The Cashier makes a payment.
- The System responds with the change due and receipt.
Abstract events:
- The System receives payment data via some mechanism not shown on the diagram.
- The System responds with the change due and receipt.