Computer E-ssentials

Computer E-ssentials

Group :

Will Howell

Tausif Rajkotwala

Komal Chandarana

Business Requirements

Provide online customer access toassemble and purchase components

Track customer information

Generate Sales and Inventory Reports

Provide billing process

Provide product search capability

Track inventory count and reorder value

Context Level

Entities

Customers

Employee

Data Flow to and from external entities

Context Diagram

Level 0

Entities

Customers

Employee

Processes

Customer Information

Customer Order

Manage Inventory

Reporting

Level 0 (Cont…)

Data Stores

Inventory

Customer Data

Inventory

Level 0 DFD

Level 1 – Customer Information

Entities

Customers

Processes

Login

Create Account

Data Stores

Customer Data

Level 1 – Customer Info DFD

Level 1 – Reports

Entities

Employee

Processes

Inventory Reports

Select Report

Sales Reports

Data Stores

Inventory

Orders

Level 1 – Reports DFD

Level 1 – Customer Order

Entities

Customers

Processes

Order Confirmation

Shipping Information

Payment Information

Submit Order

Data Stores

Inventory

Orders

Level 1 – Customer Order DFD

Level 2 – Order Confirmation

Entities

Customers

Processes

Search Product

Order Recap

Data Stores

Inventory

Orders

Level 2 – Order ConfirmationDFD

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Thank You