Make a REA Model including cardinalities for the operating events, resources, and agents. Do not include information events.

XYZ Company makes masks. XYZs customers are retail companies. XYZ Supply does not sell to the general public. When customers need masks, they place an order online which updates the Sales Order Transaction file. When orders are received, a sales representative prints two copies of the customer sales order and one copy of a stock release document. The sales representative staples one copy of the customer sales order to the stock release and sends it to the warehouse department.

The other copy of the sales order is filed numerically in the sales department. If an item in the order is out of stock, the order and stock release will be held until all items are available to be picked in the warehouse. A warehouse clerk at the manufacturing site receives the stock release and sales order. With these documents the clerk will pick and scan the goods for each order using a handheld scanner. This serves to update the Pick Transaction file. Only in stock items can be ordered as no backorders are allowed. After the pick, the warehouse clerk forwards the inventory items ordered and the stock release and order documents to the shipping department. A shipping clerk proceeds to update the Shipment Transaction file for each pick event and prints the packing list and three copies of the shipping notice. The packing list is included in the package.