This paper proposes a modeling method that links the so-called viewpoint concept with collaborative modeling. In collaborative modeling settings, problems like low model acceptance among involved stakeholders are typical because of their limited understanding of the overall model. The viewpoint-based modeling method aims at solving such problems by introducing and using stakeholder-specific viewpoints on collaboratively created models. As a consequence, the viewpoint concept facilitates and improves the involvement of multiple stakeholders from different domains into the collaborative modeling process. In addition to the conceptual design of the viewpoint-based modeling method, the paper—following design science research—presents a proof-of-concept by means of a prototypical implementation.