A process flow diagram is often used in training to document an existing process or to evaluate the efficiency of that process.

Flow charts may include different levels of detail as needed, from a high-level overview of an entire system to a detailed diagram of one component process within a larger system.

Data Flow Diagrams provide a clear understanding of the flow of data through the systems, processes, and users within your organization.

The flow chart shown overleaf illustrates the use of the Database Interface routines. Routine DIERR is not included in the diagram. It may generally be used out of sequence within the guidelines ...