Comparts has been producing computer components for various brand-named computer makers. Customer orders, which are all credit sales, arrive via mail. As the systems analyst, you have been assigned the task of developing a Data Flow Diagram for Comparts order processing system. The management provides you with the following narrative summary.

When a mail order comes in, the order processing clerk checks the customer file for credit approval. If an order is not accepted, a personalized letter is sent out explaining the reason of rejection (such as no credit, exceeded limit.) Otherwise the clerk enters the accepted order into the system on a standard order form. Then information on the order form is used to update the customer file, and place in the order file.

Every morning, using information in the order file to prepare a packing slip, the order processing clerk first checks the inventory records. If the inventory is at reorder point, a refill request is created and sent to the supplier. Then, a packing slip is prepared and sent to the Warehouse Department for every order form that is completed.

Once the Warehouse Department notifies that the goods have been delivered, customer invoice is prepared in 3 copies. One copy of the customer invoice is kept for the record, one is sent to the customer, and one is sent to the Accounting Department to collect payment. A note is made to the customer file that the invoice has been sent.

Tasks: Develop DFD for the Order Processing System at Comparts

System Outline,

Context Diagram,