The dynamism of the technology innovation and the constant changes in the worldwide geopolitical scenarios are contributing to develop a increasing turbulence in a great deal of the environments in which the petroleum organizations are situated. Therefore, the unique way for a growing future and a survival perspective for these organizations is the establishment of a management and planning process capable of disposing flexible answers to the unclear exigences of the environments. In this context this Dissertation intends to analyze the management and planning systems of the Duque de Caxias Refinery Unity - UN-REDUC, of Petrobras, comparing them with the Adaptive Planning principles and suggesting and implementing actions in order to improve these systems. This objective has been conquered with a bibliographic review and a case study in this Refinery in which the analysis of the survey has been realized. The principal survey instruments used in this case study are documental analysis and interviews with the protagonists of the management and planning Refinery processes, besides the direct observation of these processes. The job supported actions already implemented and proposals that aim a reproduction of the Adaptive Planning in the UN-REDUC daily activities. The result of the concluded survey reached not only the intended analysis, but also the proposal and the implementation of actions that desire the development of the considered processes.