This study was undertaken to accomplish five objectives: 1) to understand the need for Thailand to provide infrastructure assistance to neighboring countries , 2) to explore the various definitions of NEDA’s projects’ success from the point of view of different stakeholders comprised of the government, local administrations, and local people, 3)To explore a consensus definition of NEDA’s projects’ success, 4) to explore the factors that affect NEDA projects’ success, and 5) to propose a model for NEDA’s projects’ implementation success. The study ...