Difference between data flow diagrams and hierarchical charts?

Data flow diagrams (DFDs) visually represent the flow of data within a system, highlighting how data moves between processes, data stores, and external entities. In contrast, hierarchical charts, such as organizational charts or structure charts, depict the relationships and structure within a system or organization, focusing on the hierarchy and arrangement of components. While DFDs emphasize data interactions and processes, hierarchical charts focus on the organization and levels of authority or components. Thus, they serve different purposes in system analysis and design.