Chat Application - Requirements Analysis & Design

1. CHAT APPLICATION
Requirements Specification & Design

2. What is requirement specification & design?
A specification is a document that specifies, in a complete, precise, verifiable manner, the
requirements, design, behavior, or other characteristics of a system, and often, the
procedures for determining whether these provisions have been satisfied.

3. Purpose
■ However , the purpose of this project is to develop a java chat application.
■ The objective of this process is as follows;
■ To develop an instant messaging solution to enable users to seamlessly communicate
with each other.
■ The project should be very easy to use enabling even a novice person to use it.

4. Requirements
Functional
Non-Functional

5. Use Case Diagram
Figure 1. Use case diagram of Authentication System

6. Use Case
Figure 2. Use case diagram of Chat form
Figure 3. Use case diagram of Contact form

7. Use Case
Figure 4. Use case diagram of Monitor Figure 5. Use case diagram of Maintenance

8. ERD

9. Data Flow Diagram

10. Data Flow Diagram

11. Class Diagram

12. Sequence Diagram
Registration

13. Sequence Diagram
Login

14. Sequence Diagram
Add Friend

15. Sequence Diagram
Delete Friend

16. Sequence Diagram
Block Friend

17. Sequence Diagram
Send Message

18. Sequence Diagram
Delete Message

19. Sequence Diagram
Logout

20. ThankYou 