How Do You Construct A Data Flow Diagram?
Data Flow Diagrams are used to illustrate how information will move between interrelated systems in the accomplishment of a given function, task or process. The visual description of this information flow is typically rendered at several levels of granularity, with each given level showing how data is fed into a given process step and subsequently passed along at the completion of that step. This article shows how to approach Data Flow Diagrams in general. At the highest level, any given process may be seen as a single step, which is fed information, perhaps stores information, and ultimately passes information along. The Level 0 Data Flow Diagram, or Context Diagram, is designed to represent only the inputs and outputs of the overall process. Draw a circle in the middle of your work space. This will represent your overall process. Arrange rectangles around this process figure. Draw one rectangle for each external system that either contributes to or draws from your central process. Re
