Information for a Decision Artur Victoria A concept to be considered initially is that of Taylor in the twentieth century, where the scientific basis of administration is technological in nature. It is believed that the best way to increase production is by improving the techniques or methods used by employees. With this theory, Taylor treated employees as machines that could be manipulated by their leaders. Another theory of scientific management is related to the development of an organization in the most rational way possible, to create efficiency in management and increase production. Reformulation and restructuring of functions have been carried out to achieve greater efficiency, satisfying the economic interests of the workers through various incentive plans. Clearly, here, the role of the leader is to establish and enforce performance criteria to meet the objectives of the organization. The role of the leader is to pay attention to the organization as a whole and not to the people who were there. In 1925, the tendency was born in relation to the theory of Mayo that initiates the substitution of those standards by the movement of human relations. Greater attention is beginning to be paid to human relations, as well as to seek, through the best technological methods, to increase production. It begins to support the idea that the real centres of power in an organization were interpersonal relationships, which develop within the unit of work. Thus, the theory that the role of the leader was to facilitate the cooperative achievement of the objects among the leaders, giving opportunities for their personal growth and development and personal needs becomes the focus. In short, the scientific management movement emphasizes concern with "task" (production), while the human relations movement highlights concern about "human relations" (people). With the combination of these two concerns were structured the new theories on Leadership. Some aspects of these theories begin to be studied, as is the case of Tannenbaum's theory (1970), which speaks of the styles adopted by the leaders. This and other authors of the time spoke of autocratic and democratic leaders, claiming that before these studies they were defined as autocratic because they were much more concerned with production. They