Globalization and advanced information technologies cause the increasing development of collaborative business. This paper proposes an interorganizational workflow modeling approach for collaborative business based on local process views. In the proposed model, instead of sharing a pre-defined global workflow view among organizations, each organization has its own understanding and preference of the whole collaboration and can manage its local workflow process distributively and autonomously. Further, we provide a methodology for interorganizational workflow collaboration by two phases: the bottom-up coordination phase and the top-down implementation phase. We illustrate the effectiveness of the proposed model and collaboration approach by a case of collaborative software development process.