Which process model notation is maintained by the Object Management Group?

The correct choice is Business Process Model and Notation (BPMN). BPMN is specifically maintained by the Object Management Group (OMG), an international standards organization that develops and maintains various modeling standards. BPMN provides a graphical representation for specifying business processes in a business process model, allowing for easy communication and understanding among different stakeholders.

BPMN's focus on standardizing the way business processes are illustrated facilitates better collaboration between business analysts and technical developers. It enables users to create a visual model that clearly delineates the various activities, events, gateways, and flows of a business process. This clarity is crucial in process modeling as it helps ensure that everyone involved has a common understanding of the processes being implemented.

In contrast, Integrated DEFinition Methods (IDEF), Unified Modeling Language (UML), and Event-driven process chain (EPC) are all modeling notations but they are not maintained by OMG. IDEF is primarily related to systems engineering and is focused on functional analysis, UML is more oriented towards software development and system design, and EPC is commonly used in business process management for modeling workflow. None of these notations hold the same status within OMG as BPMN does.