The CitiMeasure Guidelines on Behaviour & Policy Change raised awareness in the city of the importance of a communication strategy and a robust evaluation plan. By selecting and applying a set of recommendations, the pilot team helped the city design these products considering the needs and challenges at the local level. With the support of additional resources, different indicators and impact domains were identified for the future evaluation of the project. Based on the experience of the city of Roeselare, the guidelines include good practices and examples for inspiration, but they are not a ‘one size fits all’ document. These guidelines should be a basis to trigger thinking about different aspects of citizen science projects and decide with the project team which ones are relevant in each case. Furthermore, a certain level of experience and knowledge is needed to operationalise the application of the guidelines. 74