Alternative Scenarios
-Extensions or exceptions to the main use case
-Number with an integer,decimal point,integer
-Steps that may or may not always be used
Use Case Footer Area
-Preconditions-need to be met before use case can be performed
-Postconditions or the state of the system after the use case has finished
-Assumptions
-Minimal guarantee
-Success guarantee
-Outstanding issues
-Optional priority and risk
Four Steps Used to Create Use Cases
-Use agile stories,problem definition objectives user requirements,or a features list
-Ask about the tasks that must be done
-Determine if there are any iterative or looping actions
-The use case ends when the customer goal is complete
Why Use case Diagrams Are Helpful
-Identify all the actors in the problem domain
-Actions that need to be completed are also clearly shown on the use case diagram
-The use case scenario is also worthwhile
-Simplicity and lack of technical detail