Bas

Front 1

Scenarios and Use Cases

Back 1

Purpose9.26.1

Scenarios and use cases are written to describe how an actor interacts with a solution to accomplish one or more of that actor’s goals, or to respond to an event.

Description9.26.2

While the terms scenario and use case are often used loosely, a scenario is generally understood to describe just one way that an actor can accomplish a particular goal, while a use case describes all the possible outcomes of an attempt to accomplish a particular goal that the solution will support.

Scenarios are written as a series of steps performed by actors or by the solution that enable an actor to achieve a goal. A use case describes several scenarios in the form of primary and alternate flows. The primary or basic flow represents the simplest way to accomplish the goal of the use case. Special circumstances and exceptions that result in a failure to complete the goal of the use case are documented in alternate flows.

Front 2

sef

Back 2

SDF

Front 3

SDF

Back 3

SDF