List 3 reasons for creating a logical dataflow diagram.
Kinley Pizza is a popular takeout delivery restaurant that wants to install a system to record orders for pizza and chicken wings. When regular customers call Kinley Pizza on the phone, they are asked their phone number. When the number is typed into a computer, the name, address, and last order date are automatically brought up on the screen. Once the order is taken, the total, including tax and delivery fees, is calculated. Then the order is given to the kitchen, where the cooks prepare the items. A receipt is printed. Occasionally, special offers (coupons) are printed so customers can get a discount the next time they order. Customers can pick up phone orders in person, and they get a receipt, a coupon (if any are issued), and their food order. Drivers who make deliveries of phone orders give customers a copy of the receipt and a coupon (if any). Weekly totals are kept for comparison with last year's performance. Write a summary of business activities for taking an order at Kinley Pizza.