The decision-making has been constituted during the last 40 years, in a discipline field of the greater relevance for different political-administrative spheres. The different academic, politics and organizationals circles have provided him a place of supremacy to the process of decision making. From the recognition of the importance of the study of the decisional phenomenon, we initially try, to explore the identification aspects between the decision- making and Public Policies by means of a general conceptualization. Next, and considering the Co-existence of these two spheres of the knowledge, an explanation will be constructed that tell of the process of decision making in public policies, which differs given to its nature and specificities, of the organizational and personal making decision process. This article contain as epistemologic bet the construction of a generic model of decision making in public policies, which can to explain the decisional phenomenon in the different governmental courses of action.&nbsp