Which activity type is NOT a part of BPMN?

In Business Process Model and Notation (BPMN), "Tasks," "Events," and "Subprocesses" are all integral components used to define the various elements and activities within a business process.

Tasks represent the smallest unit of work within a process and can be performed by individuals or systems. Events, such as start, intermediate, and end events, signify something that occurs during a process and can influence its flow. Subprocesses allow for the encapsulation of a set of tasks that can be treated as a single unit, helping with process complexity and reusability.

On the other hand, while the term "Nodes" is often used in the context of flowcharting and similar diagramming practices, it is not specifically listed as an official type of activity in BPMN. Instead, BPMN uses more specialized terminology to define its components, which includes tasks, events, gateways, and subprocesses. The term "node" is more generic and can refer to any point of connection in process diagrams, which does not align with the defined structures of BPMN.

Understanding this classification helps to navigate BPMN diagrams more effectively and utilize them in business process modeling initiatives.