Use Cases And Event Decomposition

A use case symbolizes an activity performed by the system, which is usually a response based on the request of a consumer. Two (2) The recommended way of identifying use cases is the goal-user technique and event-decomposition technique. Additional techniques can be used CRUD technique also, which is often used to validate the use cases and enrich the prevailing list.

One technique that may be relied upon to recognize use cases is to use the event-decomposition techniques. Event decomposition technique is a technique for identifying use instances with external business events know what happened and how the system should respond. Started by business events help the analyst to establish the use case at an adequate level of fine detail. Consider the following example. A system analyst who first have the ability to identify a use case as “typing in a person name on a form”.

Analyst latter can identify a use instances as a whole procedure for “adding a new customer”. Meanwhile, analyst third one can only define a use case as all transactions concerning customers, such as “adding new customers”, “updating customer records”, “deleting customers”, “following up on late-paying customers,” or “contacting previous customers”. Examples conducted by analyst. Level of detail appropriate to recognize use cases focused on elementary business processes (EBP).

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Each EBP (and every use case) occur as a reply of a business event. A meeting occurs at the right time and place, which may be identified, and can be documented by the operational system. Events spur all the processes performed by the system, so by identifying and analyzing all events will be identified use cases that reflect system requirements. 1. Make a list for each external events. Note checklist that has been specified above. 2. Identify and apply case name for any external event, which is require a response from the functional system. 3. Make a summary of temporal events.

Note checklist that is specified above. 4. Identify and make the true name of the use case for every temporal event, then specify the topic at any time that triggers the utilization case. 5. Make a list of state occasions. 6. Identify and make the name of the use case for each state event that requires the system to change the position. 7. When events and use instances are described, check if there are any occasions that use perfect technology assumption.

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