[The approach of sciences of complexity in health services administration]

Historically, health services administration has been managed under a Taylorist, Fayolist, humanist and bureaucratic focus approach. However, today dynamic and competitive behaviors that require others approaches in management are developing. Because of the social, scientific and technological changes that are occurring, it is necessary to abandon hierarchical and authoritarian schemes, "up and down" lines, prescriptive rules and order line up must be left behind. Health services administration is an adapted complex system that is not proportional, neither predictable in direction or magnitude. A new proposal is to focus on the sciences of complexity, where the social factors, materials, economics, human and ethics coincide with order and disorder, reason and unreason, and in which we must accept that the phenomenon that emerges creates different organizing different structures from the addition or subtraction of components. There is distance in the process of cause and direct effect. The mirage from the sciences of complexity are trans-disciplinary and we have accepted this in others branches of knowledge, such as quantum physics, non-linear mathematics and cybernetics, so we have to accept the influence of entropy, non-entropy, attractors, the theory of chaos and fractals.