Which modeling approach is most suitable for representing the interactions between various stakeholders?

The Business Process Model and Notation (BPMN) is recognized as the most suitable approach for representing the interactions between various stakeholders due to its standardized graphical notation that is accessible and comprehensible to a wide range of stakeholders. BPMN provides a clear and structured way to visualize business processes, including the roles and responsibilities of involved parties.

Its use of distinct shapes and symbols—such as pools and lanes—enables the mapping of processes that involve multiple actors, highlighting how they interact with one another as part of the overall workflow. This clarity is crucial for stakeholders, as it allows them to understand not just the individual tasks, but also how their contributions fit into the bigger picture of the business process.

In contrast, other options like flowcharting might provide some level of clarity, but they lack the standardized representation of roles and interactions that BPMN offers. Gantt charts are primarily used for project scheduling and do not focus on stakeholder interactions. Data Flow Diagrams emphasize the flow of data rather than the interactions between people or groups involved in a process.

Overall, BPMN stands out as the most effective methodology for illustrating stakeholder interactions, making it an invaluable tool in process modeling.