Importance 1968,Peter Drucker described the importance of Science Management-Industrial Engineering Scientific Management(Industrial Engineering)has proved to be the most effective idea of this century.It is the only basic American idea that has had worldwide acceptance and impact.Whenever it has been applied,it has raised the productivity and with it the earnings of the manual worker,and especially of the laborer,while greatly reducing his physical efforts and his hours of work. It has probably multiplied the laborer's productivity by a factor of one hundred undament of udustrial Englncertng Importance 1968，Peter Drucker described the importance of Science Management-Industrial Engineering Scientific Management(Industrial Engineering) has proved to be the most effective idea of this century. It is the only basic American idea that has had worldwide acceptance and impact. Whenever it has been applied, it has raised the productivity and with it the earnings of the manual worker, and especially of the laborer, while greatly reducing his physical efforts and his hours of work. It has probably multiplied the laborer’s productivity by a factor of one hundred