A business analyst (BA) wants to create a high-level Overview of a business process as a part of an exploratory analysis. The sponsor has asked for a model that demonstrates the movement and transform

An entity relationship diagram models the structure of data and the relationships between entities in a database but does not show how data flows or is transformed between processes.

Scope modeling defines what is inside and outside the boundaries of a solution but does not depict the movement or transformation of data.

Process modeling techniques such as flowcharts or BPMN focus on the sequence of activities and decision logic within a process, not on how data moves and transforms between entities.

A data flow diagram explicitly models the movement and transformation of data through a system by depicting external entities, processes, data stores, and the flows connecting them - which is precisely what the sponsor requested. It is a standard exploratory analysis tool for providing a high-level overview of how information enters a system, is processed, and exits to other entities. Its focus on data rather than process logic or structural relationships makes it uniquely suited to this requirement.