This book aims to improve the understanding of smart service innovations. It contributes to evidence-based knowledge about service systems engineering and its embedding in service ecosystems, in particular how existing reference process models can be extended by considering actors, roles, activities and methods. At the same time, it aims to stimulate discussions on how methods from different disciplines can be used and combined for the development of various aspects of Smart Service Systems. Thus, the book offers support for practitioners to better organize and execute SSI projects and to develop internal competencies.