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

The correct choice is UML, which stands for Unified Modeling Language. UML is a standardized modeling language used for specifying, visualizing, constructing, and documenting the artifacts of software systems. It is maintained by the Object Management Group (OMG), an international technology standards consortium that develops industry standards for a wide range of technologies and industries.

UML is particularly useful in the realm of software engineering and system design, providing a way to create detailed diagrams and representations that can aid in the understanding and implementation of complex systems. Its standardization by OMG means that its usage and interpretations are consistent across various platforms and applications, making it an important tool for professionals in the field.

The other process model notations, while they have their own significance and applications, are either not maintained by OMG or are used for different purposes. For instance, BPMN (Business Process Model and Notation) is specifically geared towards business process modeling and is different from UML, which is broader in scope. EPC (Event-driven Process Chains) and flow charts are also valuable for process mapping and visualization but do not hold the same level of formal standardization or oversight as UML by OMG.