Using graphic elements, this transaction cross-functional flowchart represents a specific business process (symbols, lines). Programs designed specifically to draw flowcharts are well-suited to creating a transaction flow diagram. TFA employs the top-down approach. Draw the upper layer of the TFD first, then each description function to detail the TFD. This chart is often confused with a swimlane flowchart. It usually has two orientations: horizontally and vertically. The things a diagram must depict are no longer limited to simple tasks a single person performs. The larger the plan, the more people participate, which necessitates defining who does what.