Computer Warehouse is a wholesale firm that supplies computer hardware to large companies. Accepting orders is subject to the customer meeting agreed-upon terms of payment. Details of rejected orders are recorded in the customer data file as part of customers’ credit history. Customers can pay for their orders either via electronic funds transfers or direct deposits into the firm’s bank account. In the interest of safety, Computer Warehouse does not accept cash payments. For each order that is verified and accepted, an invoice is generated and a pick list is sent to the warehouse. The orders are processed once their payments are received. Each order is handled by a specific sales representative, who earns a commission on each sale. The firm has six basic data files, which contain customer information, warehouse information, product information, accounts receivable, sales information, and payments information, respectively. Over the next few years, the company expects to become a multimillion dollar operation. Recognizing the need to computerize their in-store operations, the company has begun the process by calling you to assist them with documenting the ordering system.

REQUIRED

Create a context diagram and a Level 0 diagram for the order system at Computer Warehouse. Also create a Level 1 diagram for filling an order at Computer Warehouse.