You are the business analyst for your organization.

 A data flow diagram (DFD) is a graphical representation of how data moves through a system or process. It shows the sources and destinations of data, the processes that transform data, and the data stores that hold data. A DFD can help the business analyst understand the current state of a system, identify gaps or inefficiencies, and design a new or improved system. A DFD is different from a network topology map, which shows the physical layout and connections of network devices. A DFD is also different from a data dictionary and glossary, which provide definitions and descriptions of data elements and terms. A DFD is not a prototype, which is a working model or simulation of a system or product. References:

CBAP / CCBA Certified Business Analysis Study Guide, 2nd Edition, Chapter 8: Requirements Analysis, page 287-288.

Essential Guide to Business Process Mapping, Section: Data Flow Diagrams, paragraph 1-2.