An increased knowledge of innovation depends on high-quality research. However, what aspects of innovation impact positive outcomes for different actors? New insights call for the development of research methodology to be used to explore and investigate the phenomenon of innovation, i.e., processes and outcomes. In this paper, our aims are to a) describe the development of a conceptual model of social innovation at the micro level and b) describe the development of a quantitative methodology named the Social Innovation Measurement Model Questionnaire (SIMM-Q). We will also discuss some principal issues linked to research on social innovation and its relevance for co-creation.