Suppose you are given the details of a small mail order catalogue system that allows people to shop from home. When a customer receives the catalogue and wants to buy something, they can telephone,...

Suppose you are given the details of a small mail order catalogue system that allows
people to shop from home. When a customer receives the catalogue and wants to buy
something, they can telephone, fax or email their order to the company. The company
gets the order and sends the goods and an invoice. When the customer receives the
goods with a delivery note, they send payment and receive a receipt for their
payment.
Draw appropriate Context Diagram and DFD Level 0 for the above


case study.
State any assumption for the diagram.

Extracted text: CASE STUDY 1 Suppose you are given the details of a small mail order catalogue system that allows people to shop from home. When a customer receives the catalogue and wants to buy something, they can telephone, fax or email their order to the company. The company gets the order and sends the goods and an invoice. When the customer receives the goods with a delivery note, they send payment and receive a receipt for their payment. Draw appropriate Context Diagram and DFD Level 0 for the above case study. State any assumption for the diagram.