多國公司可透過與外部組織形成創新網絡以從事創新。過去的研究主要探討創新網絡的形成動機與造成的結果，鮮少探討創新網絡的構形（例如成員組成）。本研究從多國公司的觀點，探索影響產品創新專案網絡構形的因素。本研究採取多重個案研究取向，涵蓋突破式與漸進式兩類產品創新專案網絡。本研究根據參與產品創新專案的內部網絡規模與外部網絡規模兩構面，將產品創新專案網絡分類，發現產品多樣化程度、產品創新專案重要性、新穎性與技術複雜度，均會影響產品創新專案網絡類型。 Multinational corporations (MNCs) can innovate with external organizations by forming innovation networks. Previous studies focus more on the motives or outcomes of innovation networks but pay less attention to configurations of innovation networks such as the members involved. Taking the perspective of an MNC, in this paper we explore the factors affecting the configuration of product innovation project-based networks. This study adopts a multiple cases study approach and both radical and incremental product innovation project-based networks are examined. We provide a typology to classify project-based networks based on the scale of internal members joining a project and the scale of external members joining a project. We find that diversity of products, importance of projects, newness of projects and complexity of technology affect the configuration of product innovation project-based networks.