Use Case and DFD level 0,DFD level 1,DFD level 2 for at least one process for...

Question

Question

Use Case and DFD level 0,DFD level 1,DFD level 2 for at least one process for online website

engineering Computer-Science

Answer 1

Answer #1

Online Customer Purchase system website

A customer regiseters in an online purchase store website
For the registered customer , the online system will send login details
The registered customer order mobile phones which can be cancelled also
The online store system will send order acknowledgement after checking whether payment confirmed
The customer makes payment online using credit card which will be approved by credit card bank or declined
When the payment is approved by credit card bank and order is confirmed, the store's inventory staff will pack and ship the order
The order will be delivered to the customer at doorstep by the store's delivery staff

Note :

As per the question's requirement for at least one process , diagrams has been limited to specific process for DFD 0, DFD 1 and DFD 2 , though the use case will brief about all processes involved
Use case diagam has actors like small icon notations and use cases as ovals
Squares in DFD 0 and Rectangles in DFD 1 and 2 are Entities
Curved big Rectangles in DFD are Process
Rectangle partitioned with D and names i DFD are referring data store or database tables .

UML Diagram

DFD level 0 - Registration and order process at high level of 0

DFD level 1 _ Registration and order at detailed level of 1

DFD level 2 - Registration and order process in more detail which also includes payment process in more detail as level 2

Answer 2

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