Functional analysis with state machines
Sometimes beginning with the state machine is the best approach to do use case analysis. This is particularly true when the use case is obviously “modal” in nature with different operational modes. This approach generally requires systems engineers who are very comfortable with state machines. The recipe is much like the previous use case analyses and can be used instead; the output is basically the same for all three of these recipes.
The primary differences are that no activity diagram is created and the sequence diagrams are created from the executing use case state behavior.
Purpose
The purpose of the recipe is to create a set of high-quality requirements by identifying and characterizing the key system functions performed by the system during the execution of the use case capability. This recipe is particularly effective when the use case is clearly modal in nature and the system engineers are highly skilled...
