Revision with unchanged content. This study identified the success factors of action learning programs in Korean companies. The following research procedures were used: (1) identifying conceptual domains; (2) finding provisional success factors; (3) developing the instrument; (4) implementing the instrument to gather data; and (5) analyzing data. Through interviews with 13 participants and reviews by four action learning experts, 16 provisional success factors were identified within three categories; the final 53 items were then developed. A total of 1,304 participants were invited from 10 Korean companies, and 351 visited the on-line survey site. After removing useless cases, 288 cases remained for statistical data analysis, including factor analysis, correlations, and a multiple regression. As a result of the exploratory factor analysis, two success factors of action learning programs were identified: ALP Team Processes and Organizational Support Systems. The book is addressed to professionals in Human Resource Development, Training and Development, Adult Education, and Management who are especially interested in Action Learning.