Abstract:It is widely acknowledged that suppliers contribute positively to innovation in new product development. However, it remains rather unclear what suppliers actually contribute to innovation. Based on a literature review focusing on 80 articles, and a focus group meeting with strategic purchasing managers, a conceptual framework is developed categorizing different supplier inputs to innovation. This model is formulated by characterizing supplier inputs on a component level and architectural level, related to knowledge extension and knowledge reconfiguration respectively. Further, supplier inputs can be incremental or radical in nature, resulting in either a dependence on the supplier's process knowledge or the supplier's technology knowledge. These situations imply different conditions for knowledge integration.