The document outlines the various decision-making models within the European Union (EU), highlighting the Community Method, Intergovernmental Cooperation Method, Open Method of Coordination, Centralized Regulation, and Enhanced Cooperation. It discusses the evolution of these models, particularly in response to crises like the financial and refugee crises, which have shifted some focus back to intergovernmental methods at the expense of the Community Method. Additionally, it addresses the EU's competences as defined by the Lisbon Treaty, categorizing them into exclusive, shared, and supporting competences while examining the implications of crisis management on the EU's legitimacy and effectiveness.