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Software Engineering I – CS504

Assignment No. 02

Semester Fall 2013


Total Marks: 20
Due Date: 06-12-2013

The objective of this assignment is:
 To increase your level of understanding about use-case model and mapping requirements to use-case diagram.
 To help you understand how to develop context diagram.

Please read the following instructions carefully before assignment submission. It should be clear that your assignment will not get any credit if:
 The assignment is submitted after due date.
 The submitted assignment does not open or file is corrupt.
 The assignment is plagiarized.

 The assignment should be in .doc format. Assignment in any format other than MS Word format will not be accepted.
 Assignment submitted through email will not be accepted.
 This assignment is covering Use case Model and Software Design Lectures 6-12.
 Recall the lectures delivered for Software Design and Use Case Diagram and solve your assignment
For any query about the assignment, contact at

Project Description:
Instant messaging is a fast and popular, low cost, lightweight communication medium and is very affective in-home online socializing to business related communication. Instant messaging is now a significant area of research and development.
Instant Messaging is defined as “the act of instantly communicating between two or more people over a network such as the Internet”. Another way to look at instant messaging is to think of it as a form of “instant email”. A client program known as “ABC MESSENGER” (like Yahoo or any other chat Messenger) is needed for instant messaging.

Details of our chat application “ABC MESSENGER ”is:

Features and Functions
We want to build an Instant Messenger by using client server architecture. It will get authentication from main server and after login client can perform regular functions.
After the client logs in with the main authentication server, a connection is built with chat server. The same connection is used for all instant messages and chat sessions.

This Chat Messenger has multi-features that support ABC Messenger. It will support standard features as :

 Connection to the instant Messenger server
 Instant Messaging
 Contact list management (Categories like Friends, Family, Colleague etc)
 Sorting of contacts
 Offline messages feature (left for the contacts that are not online at the moment)
 Chat rooms Managements
 Text formatting for the messages
 Smiley can be included in the instant messages
 Allowing status changing

By Considering the above scenario you are required to draw
1) Use-Case diagram for the given “ABC MESSENGER”. 10 Marks
2) Context diagram (level-0) for the given “ABC MESSENGER”. 10 Marks

o Assignment should not be copied from net, handouts, books or any fellow.
o Solution should be “Precise”.

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