CollaborationDiagram
Pizza customer
Pizza vendor
clerk
pizza chef
Delivery boy
Select a pizza
Order a pizza
Ask for the pizza
Pay the pizza
Eat the pizza
Calm customer
Bake the pizza
Deliver the pizza
Receive payment
Hungry for pizza
Order received
60 minutes
pizza received
Hunger satisfied
Where is my
pizza?
End
pizza
order
money
receipt
Database