Which process model notation relies on logical operators known as "rules"?

The process model notation that utilizes logical operators known as "rules" is Event-driven Process Chain (EPC). EPC is specifically designed to depict business processes in a way that reflects the flow of events and functions, enabling clear visualization of how processes interact and change under various conditions.

In EPC diagrams, the use of logical operators facilitates the illustration of decision points, allowing for a structured representation of how the process can branch or converge based on certain criteria, or "rules." This is valuable for process analysis and optimization, as it provides insight into the conditional flows and complexities within the process.

While the other model notations—such as flow charts, UML (Unified Modeling Language), and BPMN (Business Process Model and Notation)—also serve important functions in process modeling, they do not emphasize the use of logical operators in the same manner that EPC does. Flow charts typically focus on a sequence of steps and are less about rules, UML is more geared towards software design and systems, and BPMN, while comprehensive and capable of representing complex processes, does not specifically highlight the use of logical operators as a foundational aspect like EPC does. By focusing on how EPC employs these logical operators, a clearer understanding of decision-making processes in business can be achieved.