To attain sustainable development in the 21st century, the world's population still has to overcome many challenges; hunger, poverty, environmental degradation and depletion. Policy design in such a context is and will remain a complex task. On one hand, policy makers often lack information on stakeholders strategies and constraints as well as on potential options for improvement. On the other hand, stakeholders do not always adhere to policies for lack of understanding of the pursued goals. It is not unusual to observe that often, real policy effects are not those initially expected. Furthermore, existing decision-making mechanisms for public intervention are increasingly questioned due to pressure for market liberalization, decentralization processes and the increasing role of the civil society. However, while the classical role of government is challenged, few methods have been proposed to enable the design of viable alternatives. The approach presented in this book is a contribution to the improvement of efficiency in public decision-making. Based on practical experience from Viet Nam, Indonesia and other countries, it proposes new methods for the identification of policy objective, stakeholders and issues at stake, and for the definition and implementation of concrete actions. It also provides means and guidance to foster progressive actors participation and involvement in decision-making and policy implementation processes.