After a supplier notifies a retailer of the approval of a purchase order, the supplier can either receive an order confirmation, an order change or an order cancellation from the retailer. It

may happen that no response is received at all. If no response is received after 48 hours, or if

an order cancellation is received, the supplier will cancel the order. If an order confirmation

is received within 48 hours, the supplier will process the order normally. If an order change

is received within 48 hours, the supplier will update the order and ask again the retailer for

confirmation. The retailer is allowed to change an order at most three times. Afterwards, the

.supplier will automatically cancel the order .. in PDF File Draw a model for the process in the attached file using signavio ​