Annaliza E. Nebres

OOC

Book Review 6

Book: systems analysis and design

Author: Alan Dennis and Barbara Haley Wixom

Reference no: QA 76.9 S88 D45 2003

Quotation (chapter 5)

“A use case is a set of activities that produce some output result. Each use case describes how the system reacts to an event that triggers the system.”

Elements of Use Case

This topic discusses the important data that a use cases should have. These are only few of the information you need to know. Every use case should have an actor that will trigger the event to have an input and an output.

The use case contains fairly complete description of all activities that occur in response to a trigger event. Use case have three major parts; the basic information, the inputs and outputs and the details.

First the Basic Information should have a name, number and brief description, and the name should be simple yet descriptive. The use case begins if someone trigger to that event or action. There are two kinds on how the use case has been trigger, The External and Temporal Trigger. And the Basic information should contain a consistent viewpoint. Second part is the Inputs and Outputs where you describe along with their source. This should be possible inputs and outputs. Third part is the Details part where in you need to detailed individual steps with in the use case and inputs and outputs the use case. It also contains the activities performed during the use case so the activities should be listed in order and in any conditional steps are clearly noted.

This is how you start to do a use case.