1. Texas Tech Company Data Flow Diagram
Sabrina Chen
Yen Kuang Chuang
Krishna Prasad

2. Background
Texas Tech Company is an information technology services company
Texas Tech makes software for their clients with the desired feature and function
Necessary hardware are also made for the particular software

3. Requirements Create a user friendly web bases system Easy navigation
User should be able to describe the problem in detail
A self help option where user could probably fix the problem on his/her own

4. Requirements contd.,
Display various commonly occurring problems that the user can choose from
User should be notified about the submission of the request
User should be notified if request is delegated
User should be able to modify, cancel an already created request

5. Context Diagram
Entities:
Employee
Technician
Repair Representative

6. Context Diagram

7. Level 0 Diagram Entities: Employee Technician Repair Representative
Process:
Initiate Problem Request
Service Central System
Request Processing System
Report Processing
Data Stores:
Repair Representative Data
Employee Data
Technician Data
Computer Data
Service Central Log Data
Problem Solution/ Description Data
Reserved Computer Data

8. Level 0 DFD

9. Level 0 DFD

10. Level 0 DFD

11. Level 1 Diagram – Initiate Problem Request
Entities:
Employee
Repair Representative
Technician
Process:
Initiate Problem Request
Repair Center Process
Inform Technician Management Process
Data Stores:
Service Central Log Data
Employee Data
Computer Data
Problem Solution/ Description Data
Technician Data

12. Level 1 DFD

13. Level 1 Diagram – Report Processing
Entities:
Technician
Employee
Process:
Diagnose and Solution Processing
Report and Assign Available Computer
Data Stores:
Service Central Log
Problem Solution/Description Data
Reserved Computer Data

14. Level 1 DFD

15. Level 2 Diagram – Report Processing
Entities:
Technicina
Employee
Process:
Report Processing
Assign Available Computer
Problem Ending Acknolwdge
Data Stores:
Service Central Log
Reserved Computer Data
Problem Solution/Description Data

16. Level 2 DFD – Report Processing

17. QUESTIONS ???