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| usecase diagram blog |
A
use case diagram is a graphic depiction of the interactions among the elements
of a system. A use case is
a methodology used in system analysis to identify, clarify, and organize system
requirements. In this context, the term "system" refers to something
being developed or operated, such as a mail-order product sales and service Web site.
Use case diagrams are employed in UML (Unified
Modeling Language), a standard notation for the modeling of real-world objects
and systems.
System
objectives can include planning overall requirements, validating a hardware design,
testing and debugging a software product
under development, creating an online help reference, or performing a consumer-service-oriented
task. For example, use cases in a product sales environment would include item
ordering, catalog updating, payment processing, and customer relations. A use
case diagram contains four components.
·
The boundary, which defines the system of
interest in relation to the world around it.
·
The actors, usually individuals involved with the
system defined according to their roles.
·
The use cases, which are the specific roles
played by the actors within and around the system.
·
The relationships between and among the actors
and the use cases.
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