Process Flows

Process Flows are a method of visually documenting the stages involved in performing a certain business procedure. A type of process flow popular among business managers might take the form of flow charts that show inputs or information requests, followed by each of the steps required to create deliverable outputs such as products or services from the inputs.

(Refer http://www.businessdictionary.com/definition/process-flow.html)

City Planning Input-Output Model

Process Flow diagrams can be used to illustrate complicated manufacturing processes or business organisation structures. This process can be used for town planning, manufacturing plant design, setting up a business, business process re-engineering(continuous improvement).