A control-flow diagram (CFD) is a diagram to describe the control flow of a business process, process, or review. The control algorithm, used to correct the system(control), processes the error value calculated and outputs the required input for the actuators to correct the system. The below control-flow diagram shows several-level of data transformation. You can create a similar-looking diagram using EdrawMax Online. The free diagram maker comes with free templates, symbols, and the ability to export the file in multiple formats. In addition to this, you can also share the diagram on multiple social media platforms, like Facebook, Twitter, and Line.