Salman has a store in Kuala Lumpur. Customers come into the store and browse the catalog of products. Once they have located the product they would like to purchase, they can take the unique identification number each product has and enter it into the inventory devices on the shop floor. By entering the number, the system will be able to show the customer the details of the product, whether it required home delivery and how many are left in stock.

If the customer wants to purchase the product, they fill in a slip of paper with the identification code and the desired quantity and queue for the check- out and give it to the sales assistant.

At the check-out, the sales assistant will take the slip and input the identification number into the system via their keyboard. If it shows that there are still some of the product in stock, the customer will be asked for payment (cash, laser or credit card). Once the transaction is complete it is saved to the transaction file and the customer will be given a receipt which also shows what counter they should collect the product at and an approximation of how long they will be waiting.

In the stock room as transactions occur, a stock room clerk are notified of the product and quantity and will search the stock room and bring the product to the counter for collection. They will input into the system that the order has been filled and that the customer can collect it (the product catalog will be amended for stock level); the overhead screen will indicate to the customer that they may collect their order and at which counter.

The customer may then pick up the product and leave the store. Periodically, as products are purchased the stock will run out (stock levels will be checked) and will have to be reordered from the supplier. Stock room clerk uses a wide number of suppliers so they keep a list of their contact details and the products they supply. Stock room clerk records all details relating to orders in the product- order file, this can be used to verify incoming orders later. The supplier receives a batch order for products periodically which they will fill and notify the stock room clerk of the delivery time and cost.

Required:

a.Prepare Data Flow Diagram for the process above

(15 marks)