After the automatization of business processes through the introduction of transaction systems in the last 20 years, the next wave in corporate technology adoption will be to exploit new productivity potential with a broad collaboration and a high degree of participation. Instead of delivering finished applications, business users will compose their individual applications based on user-friendly building blocks. This new demand for creating ad hoc applications to react to unexpected needs has led to a new development paradigm, known as enterprise mashups. They leverage and combine concepts from service-oriented architecture and peer production in order to empower business users.However, the current discussions in the scientific and industrial community are limited to technical aspects. The collaboration and peer production management aspects have received less attention as of vet. Thus, the present doctoral thesis aims at addressing this research gap by investigating how to organize and manage future grassroots enterprise mashup environments. To answer this research question, which is situated in the field of Information Systems and characterized by a practical nature, design science research methodology is applied.By leveraging the techniques of reference modeling, a designed multi-view scientific reference model fosters understanding and communication of this new development paradigm. It leverages observed similarities to electronic markets and communities and allows navigation through the enterprise mashup phenomenon by three disjointed and comprehensive views (architectural, organizational and operations). Instead of following a sequential development process, the interactions are organized along market transactions phases. A designed agent interaction phase model links the three views to ensure model coherences and integrates relevant governance aspects. For demonstration purposes, the reference model serves as a blueprint for the development of two mashup platform prototypes. The evaluation activity closes the design cycle by introducing the artifact into application domains, which are investigated with two case studies. These findings, combined with the results of an organized laboratory experiment, build the foundation for a business casesupporting an investment decision by IT management to introduce enterprise mashups.