Draw physical dfd, child diagram based on logical dfd.

D1 Status Product File D2 Customer data files Product code number Status Info Customer code Customer address, phone number, product request 1.1 Item Checkpoint Item request Status Data 1.3 Scan Product Code (manual) 1.2 Look up into code, price and quantity of products Request customer information and sending status data Order Customer Data 1.4 Order Data generate order from order list Status Data 1.5 Status Info Generate Information status