Project Report of Electricity Billing System
Page - 29
Use Case Model of the Project:
The use case model for any system consists of “use cases”. Use cases represent
different ways in which the system can be used by the user. A simple way to find all the
use case of a system is to ask
the questions “What the user can do using the system?”
The use cases partition the system behavior into transactions such that each
transaction performs some useful action from the users’ point of view.
The purpose of the use case to define a piece of coherent behavior without
reveling the internal structure of the system. An use case typically represents a
sequence of interaction between the user and the system. These interactions consists
of one main line sequence is represent the normal interaction between the user and the
system. The use case model is an important analysis and design artifact (task).Use
cases can be represented by drawing a use case diagram and writing an accompany
text elaborating the drawing.
In the use case diagram each use case is represented by an ellipse with the
name of use case written inside the ellipse. All the ellipses of the system are enclosed
with in a rectangle which represents the system boundary. The name of the system
being moduled appears inside the rectangle. The different users of the system are
represented by using stick person icon. The stick person icon is normally referred to as
an Actor. The line connecting the actor and the use cases is called the communication
relationship. When a stick person icon represents an external system it is annotated by
the stereo type<
>.
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