Functional analysis with activities

Functional analysis can be performed in subtly different ways. In the previous recipe, we started with the sequence diagram to analyze the use case. That is particularly useful when the interesting parts of the use case are the interactions. The workflow in this recipe is slightly different, although it achieves exactly the same objectives. This workflow starts with the development of an activity model and generates scenarios from that. In this recipe, just as in the previous one, when the work is all complete, it is the state machine that forms the normative specification of the use case; the activity diagram is used as a stepping stone along the way. The objective of the workflow, as with the previous recipe, is to create an executable model to identify and fix defects in the requirements, such as missing requirements, or requirements that are incomplete, incorrect, or inaccurate. Overall, this is the most favored workflow among model-based systems...