You are creating a model that shows how data moves through a system. Each function that modifies the data in any manner is identified, decomposed to smaller levels, and the system is completely…

Functional decomposition breaks down high-level functions into sub-functions to show hierarchy, but does not specifically trace data movement between those functions.

Data flow diagramming is specifically designed to represent how data moves through a system, capturing the processes that transform data, data stores where data rests, and external entities. The scenario directly matches DFD characteristics - tracking data movement, decomposing transforming functions to lower levels, and describing the system from input to storage.

Work decomposition (related to WBS) breaks project work into tasks for management purposes and does not model data flows within a system.

Organization modeling depicts organizational structure, roles, and relationships between people or units, not the movement of data through a system.