BUS 362 Chapter 4: Chapter 4 Textbook notes BUS 362

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Systems analysis and design chapter 4: use case analysis. Represents how a system interacts with its environment by illustrating the activities that are performed by the users of the system, and the system"s responses. Each use case describes how an external user triggers an event to which the system must respond. Everything in the system can be thought of as a response to a trigger event. basic information: name and number, priority (relative significance, actor (person/system/software/hardware that interacts to achieve a goal, trigger (external, temporal, both) preconditions (the state the system must be in before the use case commences) normal course (lists the steps that are performed when everything flows smoothly in the system) alternative courses (steps followed for alternative paths are outlined) postconditions (define the final products of the use case) exceptions (describe any error conditions or exceptions)

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