Abstract
This paper exposes some of the reasons why decision-making models in organizations do not consider ethical criteria in their models, especially because of the homo economicus and positivism assumptions. We try to solve the problem through the assumption of the unity of human action, taking Pérez López’s theory of action as a model. Some necessary philosophical assumptions are exposed to generate a model of decision making. We expose the theory of Pérez López emphasizing the epistemological and anthropological reasons for its use; especially, the fact of being a complete model of the action and not an incomplete abstraction.