The Strategy & Oversight working group oversees the development of the CitiMeasure instruments and implementation of the pilots, provides advice on development of the CitiMeasure Knowledge Centre, and contributes to the overall implementation of CitiMeasure by identifying linkages between the instruments, sharing good practices and new information, ensuring connections with external stakeholders, and being advocates for citizen science and CitiMeasure. This working group has five objectives:

• Objective 1: Ensure strong oversight, support, and advice of the WGs and the instruments being developed, including thorough review of the outputs and periodic meetings
• Objective 2: Monitoring and supporting the pilots and ensuring the lessons learned are shared
• Objective 3: Developing foresight for citizen science and CitiMeasure
• Objective 4: Supporting the development of the Knowledge Centre and its long-term business plan
• Objective 5: Engage with external stakeholders and policymakers through events, presentations, and the development of policy briefs.

The Comparability working group aims to develop a basic set of guidelines that informs citizens and city officials on which air quality sensors to use to ensure the comparability of data with other citizen science initiatives, as well as with official observations. This working group has six objectives:

• Objective 1: Co-design a structure for the inventory of air quality monitoring activities and approaches.
• Objective 2: Validate the co-designed structure by receiving feedback from the WG members and testing it to gather information about at least five different cities and organizations.
• Objective 3: Continuously add to the inventory by completing it for cities and organizations within and outside the WG.
• Objective 4: Create an online interactive tool(s) for city officials and citizen science initiatives that facilitate information sharing across cities and organizations by clarifying who is involved in air quality monitoring activities and how.
• Objective 5: Pilot the developed tool(s) by adding information about at least 50 air quality monitoring initiatives between April and December 2022.
• Objective 6: Consolidate the tool with lessons learned from the pilot phase and further analysis by March 2023.

The Behaviour and Policy working group will develop a basic set of guidelines and key principles towards increased understanding of the changes in behaviour of different stakeholder groups, as well as decision and policy making processes.  This working group has five objectives:

• Objective 1: Share ideas, case studies, best practices related to behaviour and policy change in citizen science initiatives. These best practices are documented with a close attention to their context (e.g., geographic, cultural, legal, and social context).
• Objective 2: Jointly analyse and document the lessons learned from (un-)successful initiatives in terms of catalysing changes in behaviour of different stakeholders (e.g., trust, participation behaviour, new culture of collaboration, sharing responsibilities), as well as established decision and policy making processes.
• Objective 3: By March 2022, develop guidelines and principles on behaviour and policy change that help cities and citizen science initiatives foster such changes.
• Objective 4: Pilot the developed best practice in at least one real life example of citizen science initiatives between April and December 2022.
• Objective 5: Consolidate the guideline/principles with lessons learned from the pilot phase and further analysis by March 2023.

 The Digital Inclusion working group aims to develop a basic set of guidelines that will unpack competencies required by citizens to participate in citizen science initiatives, as well as those of policy makers, decision makers and municipal employees to engage citizens in such initiatives.  This working group has six objectives:

• Objective 1: Share ideas, case studies, best practices of digital inclusion in citizen science initiative, with a close attention to issue of competencies.
• Objective 2: Jointly analyse and document competencies (knowledge, skills, attitude) required by citizens to participate in citizen science initiatives, as well as those of policy makers, decision makers and municipal employees to engage citizens in such initiatives.
• Objective 3: Map the identified competencies against specific purposes/applications for citizens, policy makers, decision makers and municipal employees.
• Objective 4: By March 2022, develop a guideline that helps cities and citizen science initiatives to understand, identify and enhance capacities and competencies required for digital inclusion of different actors. 
• Objective 5: Pilot the developed guideline in at least one real life example of citizen science initiatives between April and December 2022.
• Objective 6: Consolidate the guidelines with lessons learned from the pilot phase and further analysis by March 2023.