How is the type of an Item Flow indicated in an IBD?

The type of an Item Flow in an Internal Block Diagram (IBD) is indicated by a label near the arrowhead. This labeling provides clear visual communication about the nature of the flow, such as what type of data, material, or energy is being exchanged or conveyed through that flow. The presence of this label is critical for understanding the interaction between blocks in a system, ensuring clarity in complex diagrams where multiple flows may be present.

Utilizing labels in this way aligns with modeling best practices, as it reduces ambiguity and aids in interpreting the diagram effectively, particularly when sharing the model with other stakeholders. This feature enhances the model's usability and helps maintain consistency in representing different types of flows, thereby supporting effective systems design and analysis.