Prepare the context diagram and the parent diagram for the case.

You have to account every Entity, Data Flow, Data Store, and processes as defined in the case. You are not allowed to make any assumptions.

Case #1. Astro Athletic Supply Company

Astro Athletic Supply Company specializes in selling sports goods, gymnasium equipment, and other athletic supplies to high schools and colleges. The company handles both written and telephone orders, using the following procedures.

One of several company-employed field sales representatives records customer orders on a three-part form (Form 191A). The original is left with the customer, the duplicate is mailed to central headquarters each day in a special color-coded envelope, and the triplicate is retained in the sales representative's order pad. When the written orders arrive at headquarters, they go directly to the secretary of the order entry department. The secretary initially receives all telephone orders and inquiries as well.

The secretary routes inquiries to the customer service representatives and directs both written and telephone orders to one of the three order entry clerks. Telephone orders are transcribed onto Form 191B and then read back to the customer for confirmation. Because both written and telephone orders are now in written form, further processing of Forms 191A and191B is identical.

All customer orders are entered through Video Display Terminals located in order entry. They undergo a series of programmed edits as part of the data entry process. One of the edits is to validate the customer's name(s),address(es), freight and credit terms, and credit rating by referencing the customer master file (note: all computer files are kept on disk). The inventory master file is accessed to check inventory availability.

Orders that pass all these tests are then recorded on the sales order master file, the inventory balance is reduced, and a screen message informs the clerk of the updates. The clerk files the accepted customer orders by customer number. Orders that fail any of the edits or validations are recorded in a computer "suspense" file for later investigation.

Each evening, data processing prints five-part sales orders, (Form 191C) from the data stored on the sales order master file. Order entry receives two copies of the sales order; it files copy 2 in the accepted order file and mails the original (copy 1) to the customer. Copies 3 and 4 are sent back to the warehouse, and copy 5 is sent to accounts receivable. Using copy 3, warehouse workers pick the goods. They file copy 3 and deliver the goods and copy 4 to the shipping department.

A shipping clerk checks the assembled order against sales order copy 4, prepares a three-part shipping notice (Form 191D), and records the shipment in a shipping log. The shipping notice original, signed by the carrier, serves as the bill of lading; sales order copy 4 is used as the packing slip. The bill of lading and the packing slip accompany the gods to the customer. The duplicate of the shipping notice is sent to accounts receivable; the triplicate is sent to order entry, where it is filed in the accepted order file.