bpmn dmn standard blog posts

BPMN Black-Box Pools in Multi-Pool Models

Blog: Method & Style (Bruce Silver)

I recently received the following from a former student in my BPMN Method and Style training: "I'm trying to find some rules regarding when pools should be shown as a black box with message flows to the pool boundary or multiple white box pools with message flows connecting events/activities within the different pools. From what I have seen, it seems that the multi-pool method can be used when showing interaction between different processes and black box pools are used to show external process participants.