Petries Electronics Week 4

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Petrie’s Electronics Case Week 4 Business Systems Analysis Diana Sawyer 14 April 2014 Petrie’s Electronics Case 2. Again, review the DFD’s you developed for the Petrie’s Electronics case (or those given to you by your instructor). Use these DFDs to identify the attributes of each of the six entities listed in this case plus any additional entities identified in your answer to Question 1. Write an unambiguous definition for each attribute. Then, redraw PE Figure 7-1 by placing the six (and additional) entities in this case on the diagram along with their associated attributes. The six entities in this case are as followed: 1. COUPON 2. CUSTOMER 3. PRODUCT 4. PROMOTION 5. SERVICE 6. TRANSACTION The COUPON will be linked to a product, a service and then linked to the Promotions and Transactions. Since it will be a dollar amount off a service or product it will be needed to be taken into consideration when it is redeemed with a promotion. The attribute would be the Coupon ID and Coupon Bar Code The CUSTOMER will be linked to basically all entities. A customer is someone that will purchase a product or service. The attribute would be the Customers Name, Address, Phone Number and Customer ID The PRODUCT will be linked to the transaction and the customer. The product is anything that is up for purchase buy a customer. The attribute for the product would be a Product Number, Product Name The PROMOTION will be linked to the customers since they are they ones that will be redeeming or considering a purchase based on a companies promotional sale or coupon. The attribute would be a Promotion code The SERVICE will also be linked to the Transaction and the Customer since the service will be purchased by the customer. The attribute would be the Service number The TRANSACTION will be linked to the Customer, as they are the ones that

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