When was the following statment made?
“In order to achieve measurement, tools are needed and the most important of these is the process chart. Once a process chart has been drawn up, common sense is all that is needed to improve efficiency and better the process being examined. The process chart then, is the lifeblood of work simplification. It is an irreplaceable tool. It is a guide and stimulant. It takes time to properly utilize but there is absolutely no doubt that it works.”
If you guessed 1990, you are about 58 years off. Allan H Mogensen included that insight in his excellent book, Common Sense Applied to Motion and Time Study, published by McGraw-Hill in 1932.
*Thanks to http://www.processchart.com for this information!