Constructing a concurrency model
You can construct a Concurrency Model through the Relationships pane and other Modeler panes. Expand the Concurrency Model folder to display the structure of the Concurrency Model. Concurrency Model items are organized into folders for each type of item.
Build up the Concurrency Model by adding items to the dictionary and
creating associations between permitted items. You can then, if required, automatically populate a Concurrency Diagram with information that you have added.