Despite the growing interest and attention from Information Technology researchers and practitioners, empirical research on factors that influence an organization's likelihood of adoption of Web Services has been limited. This study identified the factors influencing Web Services adoption from the perspective of 151 South Korean firms. The determinant factors of the Web Services adoption decision were identified from both in-depth interviews with Web Services experts and a literature review. The main data were responses by a key individual in each firm using a survey questionnaire that was developed and tested on a pilot survey of 74 South Korean firms. The results of both Spearman's test and t-test show that certain factors are far more important than others in influencing a firm's expected adoption decision. The most important predictors were firm age, job role, industry type, size, trust, and business benefit driver as critical determinants of the expected adoption of Web Services. Other important factors include perceived Web Services maturity, strategic intent, readiness, management knowledge and involvement, and regulation. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]