Over 15 years of existence of Public Organization (PO), many questions and public issues have been raised over the performance, efficiency and cost-effectiveness of PO. This study therefore has a goal to understand and present the performance of PO, that have been established under the Public Organization Act of 1999. The main objectives of this study are: 1) to investigate the performance of Public Organizations in Thailand, 2) to explore the key factors affecting the performance of Public Organizations and 3) to provide recommendations, ...