The data flow diagram of an online system is a diagram that depicts the movement of data within a business information system. A data flow diagram (DFD) illustrates data transfer between processes, data stores, and entities outside the system. For several years, it has been widely used in software engineering. With this Online system data flow diagram template, you can now create a professional Data Flow Diagram. Data transformation within a system can be expressed in various ways, one of which is through a Data Flow Diagram. This management tool is ideal for identifying redundancies in your system and, more importantly, optimizing the speed and responsiveness of your system.