As a result of the high degree of change, interdependence and uncertainty of the current business scenario, companies of all industry sectors are facing new challenges associated to the need of adaptation and innovation. This thesis intends to point out that the Adaptive Planning represents an answer for management problems associated to turbulent environments, and the Real Options Theory is a significant managerial instrument to increase the efficiency of strategic decisions. This study aims at describing and analyzing the evolution of the planning approach adopted at Empresa Brasileira de Aeronáutica S.A. - Embraer according to the Adaptive Planning principles and to propose the adoption of the Real Options Theory on its decision-making process. It consists of an investigation of the post-privatization phase of Embraer s planning evolution and the economic investment evaluation tools currently used at the Company. The thesis ends with the proposal of few applications for the real options method at Embraer, which can be introduced in its planning process.