Question

Question 2 - Data Flow Diagrams (10 marks] [2 marks each error] Given the level 0 Data Flow Diagrams as below, identify and mark on the diagram at least 5 errors. If a same error occurs multiple times, then it is counted as multiple errors. w 1 Company Het promotionne Hot promovone news Check Latest Promotions Warohouse Hems details Home details Build Shopping Us Shopping ist details Shopping Cart Chopping lot details View Shopping List > Customer Home deta Soaren om Instal Supermarkets' physical location details Supermarkets physical location des Check Location

Answer 1

ANSWER:

ERROR 3 check promotions Company Check Lato Hot promotions now ERROR 4 x les details Warehouse tems details Items details Build Shopping List Shopping Ideas Shopping Cart Chopping for details View Shopping List Customer check shopping cart ERROR 5 4 Home det Search items Instal 5 Supermarkets' physical location details Supermarkets physical acaban det Х Checklication ERROR 1 ERROR 2

Explanation:

Error 1 & Error 2: As shown in the above image, Error1 and Error 2 are that here Company is giving the Super market's physical location details to the customer. In general, a Ecommerce shopping website will just do home delivery, but does not give the physical location of the Supermarket to the customer.

Error 3: As shown in the above image, error 3 is that initially customer will be checking if there are any promotions or offers available, that arrow is missing.

Error 4: As shown in the above image, error 4 is that warehouse (place where all the goods are stored) database giving the item details to build shopping list. From the figure, it is clear that initially customer searched for the items, then he got the item details from warehouse database, then he selected the item and added to build shopping list. So, it is clear that Warehouse database will not add items to build shopping list, its the customer choice to select the item.

Error 5: As shown in the above image, error 5 is that generally a customer selects various items and add to the shopping cart. When he want to check the shopping cart, then the shopping cart will be displayed to him. Here the arrow to the shopping cart that customer wants to check the shopping cart is missing.

ADDITIONAL ERROR 6: Also, search items is numbered as 4, but it should be numbered as 2, building shopping list should be numbered 3 instead of 2. because customer can build the shopping list only after searching the items that he wants.

Finally after correcting the 5 errors, we have the proper diagram which is as shown in the following figure.

Hot 'Promotion check Promotions Company Check latest K Promotions Hot Promotion news Warehouse Build stopping Itam details. List Customer Item details Shopping list details. (shopping cart shopping list details (View Shopping List Check Shopping Cart Item name Search items Item details Item details,