ABCC Company is developing a new computer order processing system to process large amount or bulk order sales of its products electronically. Customers send in their bulk orders with details of quantities, sizes, colours, models, materials etc., by email, together with a credit card payment. Availability of the ordered goods is then checked in an inventory file; and the validity of the credit card payment is checked online to customers bank. Both checks must be successful in order to complete the transaction. If the goods ordered are out of stock, then the order is placed on a waiting list and reconsidered at the end of the week. If the bank does not give the credit card payment authorization, then the order is rejected, an explanatory note is emailed back to the customer. If these two checks are successful, a dispatch paid order is emailed to the customer and warehouse. The warehouse is a third party company responsible for delivery of ordered goods to customers.

From the above description, draw a data flow diagram showing the flow of input information (and/or data) and output information (and/or data) to and from processes within this order processing system and any external environmental elements that interact with this order processing system. In this diagram, you must identify the following:

1. Internal processes inside this ordering system .

2. database stores, external environmental elements that interact with any of the processes identified in (a) .

3. input and output information (and/or data) to and from each of the processes, database stores and external environmental elements identified in (a) and (b)

(Hint: there are three environmental elements that interact with this order processing system, and six main processes in this order processing system)

State any assumptions if any.