The Psychology of Management by Lillian Moller Gilbreth

Each of the above functions may be in charge of a separate man, or one man may be in charge of several functions, or several men may do the work of one function; the work being divided between them in some cases by further functionalizing it,--and in others by separating it into similar parts. Which of these conditions is most effective depends on the size of the job, or the nature of the job to be done. The important question is, not the number of men doing the planning, but the fact that every foreman, so far as is possible, is assigned to the special kind of work that he is best fitted to do with the greatest elimination of unnecessary waste. CHANGES IN THE FUNCTIONS OF THE FOREMAN.--A Foreman, under Scientific Management, must have three qualifications. He must be