T
taozhiyu
Unregistered / Unconfirmed
GUEST, unregistred user!
下面复制于ROSE的帮助。我觉得这个里面说的很清楚了！[
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Use Case
In its simplest form, a use case can be described as a specific way of using
the system from a user’s (actor’s) perspective. A more detailed description
might characterize a use case as:
· a pattern of behavior the system exhibits
· a sequence of related transactions performed by an actor and the
system
· delivering something of value to the actor
Use cases provide a means to:
· capture system requirements
· communicate with the end users anddo
main experts
· test the system
Use cases are best discovered by examining the actors and defining what the
actor will be able todo
with the system.
Since all the needs of a system typically cannot be covered in one use case,
it is usual to have a collection of use cases. Together this use case
collection specifies all the ways of using the system.
]Use Case
In its simplest form, a use case can be described as a specific way of using
the system from a user’s (actor’s) perspective. A more detailed description
might characterize a use case as:
· a pattern of behavior the system exhibits
· a sequence of related transactions performed by an actor and the
system
· delivering something of value to the actor
Use cases provide a means to:
· capture system requirements
· communicate with the end users anddo
main experts
· test the system
Use cases are best discovered by examining the actors and defining what the
actor will be able todo
with the system.
Since all the needs of a system typically cannot be covered in one use case,
it is usual to have a collection of use cases. Together this use case
collection specifies all the ways of using the system.
