Use a data flow diagram to document the logical flow of data through a set of processes or procedures. You can include external sources and destinations of the data, activities that transform the data, and stores or collections where the data is held.
- Click the File tab.
- Click New, click Software and Database, and then double-click Data Flow Diagram.
- From the Data Flow Diagram Shapes stencil, drag an External interactor shape onto the drawing page to represent each external source or destination for data.
- Drag more shapes onto the page to represent the processes, states, or entities involved in the data flow you are documenting.
- Indicate the flow of data in your diagram with Center to center shapes and indicate data loops using Loop on center shapes.
Indicate data flow between objects
Indicate a data loop
- From Data Flow Diagram Shapes, drag a Loop on center shape onto the drawing page near the place where you want to indicate a data loop.
- Drag the begin point of the Loop on center shape to the center of the state or process shape that has the data loop. The endpoint turns red to indicate that the shapes are connected.
- To change the size or position of the loop, drag the end point. To change the location of the ends of the loop, drag the control handle and the selection handle .