Question

Read the narrative below of an ordering process:

The mailroom receives customer orders from customers, where clerks sort orders from the rest of the mail, group them into bathes, and forwards the orders to the order entry department. A clerk in the order entry department first checks that the batch is complete. The clerk looks up the customer number in a customer file and then keys the essential customer information into a network computer. The computer then checks the customer file, which is stored on disk, to see that the customer exists and has an acceptable credit record. The computer displays the approval of the customer on the order entry clerk’s computer terminal. The clerk then keys in the rest of the order. The computer logs the order in a sales order transaction file, which is stored on tape. At the end of the day, the computer processes the tape against the customer file and prints a picking ticket, a sales order notification, and a vendor acknowledgement. The computer sends the picking ticket to the warehouse, the sales order notification to the shipping department, and the vendor acknowledgement to the vendor. Develop a logical level-0 DFD for the above process.

Answer 1

Please refer to the attached image (self explanatory)for the draft version of the level 0 dfd of the online order processing system described above.

Hope this gives a rough idea.