Organization development (OD), as an applied arm of the field of organizational behavior, purports to facilitate organizational change through the use of a variety of change interventions. Its proponents feel that the tools and techniques of OD can improve an organization's problem-solving ability, increase its ability to adapt to rapid societal change, and provide managers an updated set of concepts and methods for managing their organizations. This article reviews and evaluates the research on the impact of organization development interventions. Although there is an abundance of literature on OD, there is very little research on its effects that can withstand the rigorous testing most social scientists would expect. Furthermore, there is research available on only six interventions of the wide variety reported in the literature. Although there is a paucity of research information in this area, what is available does help to identify what is known and what is speculation about OD. More important, the review reported here indicates areas for improved research and directions for future research.Organization development has existed for something more than a decade as a technology that purports to facilitate organizational change and indirectly lead to increased organizational effectiveness. Whether this growing technology has a solid theoretical and empirical base and whether it can produce the changes that the &dquo;field&dquo; claims can and do occur in organizations are questions that both practitioners and academicians are beginning to ask.The objectives of this review are threefold. First, to find research that can answer these questions; second, to identify the problems in existing research studies in order to guide future research; and, third, to summarize the conclusions that may be drawn from the research that does exist on OD.