At the end of 2021, we delivered a monitor to measure the progress towards a circular economy in Flanders. In this cluster, we will further extend this monitor, looking for new indicators. In the current monitor, the following indicators are missing: indicators from a production perspective, incidators looking at higher R strategies and indicators looking at the effects of the transition. For this, we need new data sources and methodologies to ensure that the monitor can give specific feedback on the policy to transition to a circular economy.