The work presented in this article relates directly to perhaps the most serious problem facing the Information Systems manager in a large, complex organization today, namely how to plan and manage in a rapidly changing, high-demand, resource-limited environment. The article describes an organizational change effort undertaken within a major data processing organization to seek improvements in four broad areas: data center production performance, responsiveness of the systems development activity, management control and decision making, and long range and operational planning processes. Much of the change effort involved activities and tasks which were defined and implemented using Organization Development (OD) methods. OD involves the application of behavioral science knowledge in a collaborative and participative process in response to some perceived need within the organization. It is a planned and systematic way to alter patterns of organizational behavior. The general change strategy utilized is described along with specific examples of particular OD techniques, those which worked well and those which did not. Finally the article presents some observations as to why OD methods are important to Information System development.