Measuring integration is different from measuring the performance of integrated care. This report addresses this dual challenge: on the one hand it focuses on design principles, building blocks, and system levers, to identify principles and factors that enable successful and effective integration of care. On the other hand the report looks for tailored ways to assess the performance of integrated care models in such a way that is able to capture the specific added value brought in by the integration. The findings of this report are based on the discussions that took place