Irma H Gross and Elizabeth Walbert Crandall, Management for Modern Families, Second Edition, Appleton-Century-Crofts, 1963


The many values and one of the limitations of process and operation charts are well given as follows:

Thus the main uses of process and operational charts are for educational and promotional purposes. In this they serve an extremely useful end. They help in training investigators, they make one motion and time conscious, they sharpen one's power of observation, and they help in learning the principles of effective work. Also, they assist in instructing...in a new method. Too, charting enables [one] to test his hypotheses by constructing the new method on paper and predicting its accomplishments. In other words, charting creates an orderly environment for the development of improved work methods, but, in the final analysis, much of the creation is the product of the analyst's ingenuity" ("What We Have Learned from the Industrial Engineer," Work Simplification News Letter, Purdue University, No. 11 (May, 1945), pp. 9-10)