of information flow throughout an organisation. Process flow diagram, in Operations, a graphical representation of a process Product flow diagram (PFD), a graphical representation of the order by which a sequence of products is created according to Product based planning principles. A form of rap notation known as "flow diagram". Sankey diagram, where line width represents magnitude Signal-flow graph, in mathematics, a graphical means of showing the relations among the variables of a set of linear algebraic relations State diagram, a representation of a finite state machine See also Flow graph (disambiguation) Function model Visual programming language References Diagrams