Contents
Can a use case include another use case?
When a use case is depicted as using the functionality of another use case, the relationship between the use cases is named as include or uses relationship. A use case includes the functionality described in another use case as a part of its business process flow.
What does it mean for a use case to include another use case?
Include = reuse of functionality (i.e. the included functionality is used or could be used elsewhere in the system). Include therefore denotes a dependency on another use case. Extends = adding (not reusing) functionality and also any optional functionality.
What is the difference between a precondition and a trigger?
There are subtle differences between them. Preconditions are promises that describe the state of the system prior to initiating the use case. Triggers are events that cause a use case to be initiated. Any given trigger is optional.
What is pre and post-conditions?
Pre-conditions are the things that must be true before a method is called. The method tells clients “this is what I expect from you”. Post-conditions are the things that must be true after the method is complete.
What triggers a use case?
Primary events will trigger a use case, whereas secondary events will form part of the use case dialogue. There can be many secondary events for each primary event. The primary event initiating a use case is called a stimulus. The secondary events that are part of the use case dialogue are called interactions.
What is precondition and postcondition in test case?
Pre-conditions: The actions of the user or of the system that must have occurred in order for the functionality to be provided. Preconditions do not include steps in the Test Case Workflow. Post-conditions: The changes to the system after the user completes the Test Case Workflow.
What is a precondition in a use case?
A precondition is the state of the system and its surroundings that is required before the use case can be started. A postcondition is the states the system can be in after the use case has ended. Consider the following: The states described by pre- or postconditions should be states that the user can observe. Click to see full answer
What’s the difference between preconditions and triggers?
Documenting preconditions and triggers is important to validating the completeness of use cases and requirements. There are subtle differences between them. Preconditions are promises that describe the state of the system prior to initiating the use case. Preconditions are mandatory. Triggers are events that cause a use case to be initiated.
Is the installation of the software a precondition?
The installation of the software for your app should not be a precondition: the app can’t check if it is not installed as it can’t run and it it does execute then it is obviously installed… For me, system requirements and/or software installation can be a part of a precondition but as always it must be relevant in the context of your use case.
When do you need a ” have to be logged in ” precondition?
To take you example, the “have to be logged in” precondition may be necessary if you expect different behaviour if the user is logged in or not, or if different privileges are required for the operation.