Scientific Theory of Management by Frederick Taylor, which had factory managers breaking down tasks into small pieces, forcing their workers to specialize, and financially incentivizing them to complete those tasks efficiently. It was a brute force method, but it worked pretty well.

Perhaps the most prominent single element in modern scientific management is the task idea. The work of every workman is fully planned out by the management at least one day in advance, and each man receives in most cases complete written instructions, describing in detail the task which he is to accomplish, as well as the means to be used in doing the work. And the work planned in advance in this way constitutes a task which is to be solved, as explained above, not by the workman alone, but in almost all cases by the joint effort of the workman and the management. This task specifies not only what is to be done but how it is to be done and the exact time allowed for doing it.

A better name for scientific management is "measured functional management." It is not sufficient to call it " labor saving 'management " for it deals with more than labor and labor saving. It is a way for obtaining methods of least waste. It not only saves useless labor, but it improves labor conditions; improves quality of product; prolongs the period of the worker's productivity; conserves, teaches and transfers skill and experience. The committee have caused the Society and the world to recognize at last the importance of the feature of the transference of skill, but they apparently still lack appreciation of the even greater feature of the recording and transference of experience of Mr. Taylor's measured functional management and of micro-motion study. Mr. Taylor's system is best described in his writings entitled A Piece Kate System, Shop Management, and On the Art of Cutting Metals, published by the Society, and Principles of Scientific Management, published by Harper & Brothers.

Frederick W. Taylor was the first man in recorded history who deemed work deserving of systematic observation and study. On Taylor's 'scientific management' rests, above all, the tremendous surge of affluence in the last seventy-five years which has lifted the working masses in the developed countries well above any level recorded before, even for the well-to-do. Taylor, though the Isaac Newton (or perhaps the Archimedes) of the science of work, laid only first foundations, however. Not much has been added to them since – even though he has been dead all of sixty years.

Scientific Management is not a new "system," something "invented" by a man called F. W. Taylor, a passing novelty." It is something much deeper, an attitude towards the control of human systems of co-operation of all kinds rendered essential by the immense accretion of power over material things ushered in by the industrial revolution...

One of the hardest-to-down myths about the evolution of mass production at Ford is one which credits much of the accomplishment to 'scientific management.' No one at Ford—not Mr. Ford, Couzens, Flanders, Wills, Pete Martin, nor I—was acquainted with the theories of the 'father of scientific management,' Frederick W. Taylor. Years later I ran across a quotation from a two-volume book about Taylor by Frank Barkley Copley, who reports a visit Taylor made to Detroit late in 1914, nearly a year after the moving assembly line had been installed at our Highland Park plant. Taylor expressed surprise to find that Detroit industrialists 'had undertaken to install the principles of scientific management without the aid of experts.' To my mind this unconscious admission by an expert is expert testimony on the futility of too great reliance on experts and should forever dispose of the legend that Taylor's ideas had any influence at Ford.

It... has long been realized by those engaged in the work of installing scientific management, that transference of skill is one of the most important features(*)... The importance of transference of skill was realized many years ago. Studies in division of work and in elapsed time of doing work were made by Adam Smith, Charles Babbage, M. Coulomb and others, but accurate measurement in management became possible when Mr. Taylor devised his method of observing and recording elementary unit net times for performance with measured allowance for fatigue.

The Methods of Industrial Management. — A committee of the American Society of Mechanical Engineers made an extensive canvass in the fall of 1912 to determine what were the new elements in modern management as well as what the committee designated as the regulative principles of industrial management. The committee confirmed Adam Smith's statement made in 1776 in his Wealth of Nations, in which he held that the application of the principle of division of labor was the basis of manufacture. The committee also agreed with Charles Babbage, who in his work entitled Economy of Machinery and Manufacture written in 1832, added another principle, namely the transference of skill.

What I want to try to prove to you and make clear to you is that the principles of scientific management when properly applied, and when a sufficient amount of time has been given to make them really effective, must in all cases produce far large and better results, both for the employer and the employees, than can possibly be obtained under even this very rare type of management which I have been outlining, namely, the management of ‘initiative and incentive’, in which those on the management’s side deliberately give a very large incentive to their workmen, and in return the workmen respond by working to the very best of their ability at all times in the interest of their employers. I want to show you that scientific management is even far better than this rare type of management.

There is some confusion today as to the meaning of scientific management. This concerns itself with the nature of such management itself, with the scope or field to which such management applies, and with the aims that it desires to attain. Scientific management is simply management that is based upon actual measurement. Its skilful application is an art that must be acquired, but its fundamental principles have the exactness of scientific laws which are open to study by everyone. We have here nothing hidden or occult or secret, like the working practices of an old-time craft; we have here a science that is the result of accurately recorded, exact investigation.

The management science approach to organizational decision making is the analog to the rational approach by individual managers. Management science came into being during World War II. At that time, mathematical and statistical techniques were applied to urgent, large-scale military problems that were beyond the ability of individual decision makers. Mathematicians, physicists, and operations researchers used systems analysis to develop artillery trajectories, antisubmarine strategies, and bombing strategies such as salvoing (discharging multiple shells simultaneously). Consider the problem of a battleship trying to sink an enemy ship several miles away. The calculation for aiming the battleship's guns should consider distance, wind speed, shell size, speed and direction of both ships, pitch and roll of the firing ship, and curvature of the earth. Methods for performing such calculations using trial and error and intuition are not accurate, take far too long, and may never achieve success.
This is where management science came in. Analysts were able to identify the relevant variables involved in aiming a ship's guns and could model them with the use of mathematical equations. Distance, speed, pitch, roll, shell size, and so on could be calculated and entered into the equations. The answer was immediate, and the guns could begin firing. Factors such as pitch and roll were soon measured mechanically and fed directly into the targeting mechanism. Today, the human element is completely removed from the targeting process. Radar picks up the target, and the entire sequence is computed automatically.

Scientific management... has for its very foundation the firm conviction that the true interests of the two are one and the same; that prosperity for the employer cannot exist through a long term of years unless it is accompanied by prosperity for the employe, and vice versa; and that it is possible to give the workman what he most wants high wages and the employer what he wants a low labor cost for his manufactures.

Many associate the word scientific with physics. But it means much more than that. Scientific management means a constant search for the facts, the true actualities, and their intelligent, unprejudiced analysis. Thus, and in no other way, policies and their administration are determined. I keep saying to the General Motors organization that we are prepared to spend any proper amount of money to get the facts. Only by increased knowledge can we progress, perhaps I had better say survive. That is really research, but few realize research can and should be just as effectively used in all functional branches of industry as in physics

The traditional approaches to time management and personal organization were useful in their time. They provided helpful reference points for a workforce that was just emerging from an industrial assembly-line modality into a new kind of work that included choices about what to do and discretion about when to do it.