The literature on information systems development appears to be fragmented into three main categories: one that uses a knowledge management perspective, another one that considers social aspects of information systems development, and the last one that emphasizes the role of information technology. Such fragmentation detains the understanding of influential factors. In this paper, we synthesize the prior literature on information systems development and propose a concise model that incorporates all three approaches to assess the relative importance of each category. We empirically tested the model by using a three-wave longitudinal dataset of 64 teams consisting of more than 250 individuals. We found that individual and organizational factors are more important than technological factors. While human capital is the strongest predictor, IT support does not affect team performance. Our findings yield implications for both the theory and the practice.