Presentation given at #CESToronto2013. Abstract: Developmental evaluation (DE) supports social innovation and program development by guiding program adaptation to emergent and dynamic social realities (Patton, 2011; Preskill & Beer, 2012). This presentation examines a case study of the pre-formative development of an innovative educational program. It contributes to research on DE by examining the capacity and contribution of DE for innovating. This case provides evidence supporting the utility of DE in developing innovative programs, but challenges our current understanding of DE on two fronts: 1) the necessary move from data-based to data-informed decision-making within a context of innovating, and 2) the use of DE for program co-creation as an outcome to the demands of social innovation. Analysis reveals the pervasiveness of uncertainty throughout development and how the rendering of evaluative data helps to propel development forward. DE enabled a nonlinear, co-evolutionary development process centering on six foci of development-definition, delineation, collaboration, prototyping, illumination, and evaluation-that characterize the innovation process.