1. Business Requirements
System should allow new user to register
and buy membership online.
Employee should be able to edit and add
the daily reports and update the
data store.
The system should include facilities like
Easy to prepare weekly and monthly reports.
Automatic alerts should be sent to the members if there is a new crime in the area.

2. CONTEXT LEVEL

3. LEVEL 0 DFD External Entity Users Employees Police department
Processes
Registration
Report request
Report generation process
Processing data
Data store
User and Employee data
Payment data
Report
Crime data
Membership invoice

4. LEVEL 0

5. LEVEL 1 REGISTRATION External Entity Users Employees Processes
Employee Registration
Users Registration
Membership Type
Payment Process
Data store
User and Employee data
Payment data
Membership invoice

6. LEVEL 1 REGISTRATION

7. LEVEL 1 REPORT REQUEST External Entity Users Processes
Crime rate based on zip code
Automated report generation process
Data store
Report
Crime data

8. LEVEL 1 REPORT REQUEST

9. LEVEL 1 PROCESSING DATA External Entity Users Police department
Processes
Query Processing
Automated data updating and classification
Data store
Report
Crime data

10. LEVEL1 PROCESSING DATA

11. Q & C