Draw the context diagram and a Level 1 DFD for a Sandwich delivery system. Joes Sandwich Shop wants to install a system to furniture orders for Sandwich and calzones. When a regular customer calls Joes Sandwich Shop on the phone, the cashier, usually Terri, asks their phone number. Terri types of the number into a computer and the name, address, and last order date is automatically brought up on the screen. Once Terri takes the order, the total, including tax and delivery, is calculated. Then Terri gives the order to Jimmy, the cook. The receipt is printed. When the Sandwich is ready, Jimmy gives the Sandwiches and the order tag to Hillary, the driver, who then delivers the Sandwiches. She gives customers a copy of the receipt. Weekly totals are kept for management. Draw both a Context and Level 1 DFD for Order Entry Department work process at Keane Furnitures.

Keane Furniture is a mail order company that distributes Lamps and tables at discount prices to furniture club Customers. When an order processing clerk receives an order form, she verifies that the sender is a club Customer by checking the CUSTOMER FILE. If the sender is not a Customer, the clerk returns the order along with a Customer ship application form. If the customer is a Customer , the clerk verifies the order item data by checking the PRODUCT FILE. Then the clerk enters the order data and saves it to the DAIILY SHIP FILE. At the same time, the clerk also prints an invoice and shipping list for each order, which are forwarded to the FULFILLMENT DEPARTMENT for processing there.