Flowchart of the PSP data process from publication: Unsteady pressure-sensitive-paint (PSP) measurement in low-speed flow. From this flowchart, you can check the process of reservation. Any graphical and visual representation of any process related to the business by chart or flowchart is called a process flowchart. It is used to have a clear and systematic understanding regarding how the operation of the company progresses or works. Learn more details from this flowchart, or try to make yours with ease.