Organizations constantly need to change due to their desire to improve, or due to the need to adapt to changes in the environment. The use of enterprise models could be a potential aid in this transformation process - by using models an organization can describe its business, analyze it, and design changes. For an organization, models may be important in order to determine if a transformation should be pursued, and determine the consequences of performing the transformation. In this paper, we report on a case study performed at an organization that uses enterprise models. Based on a set of business transformations that the organization is considering, we examine how the existing models they use can help in expressing the changes needed, and the shortcomings of existing models. We conclude with a set of tentative shortcomings of traditional models and pointers for future research addressing these.