Systems Dynamics Models
Systems Dynamics Models are “activity on arrow” diagrams rather than “activity on node” diagrams like most of the other notations. These are more often used to model an entire enterprise or line of business than to model lower‐level workflow. They describe the enterprise business “architecture” from a dynamic behavioral perspective rather than a static structural perspective.
Source: Guide to the Business Process Management Body of Knowledge – ABPMP BPM CBOK V3.0.