According to the intensity, participation methods can be categorized into four levels. Stelzle and Noennig(2017) show an overview of digital and non-digital methods to achieve citizen participation.

1. Information
   • Informational meetings
   • Information material(online)
   • Information points
   • Information material(offline)
   • Stakeholder/Issue mapping
2. Consultation
   • Consultative meetings
   • Consultation(online)
   • Displays/exhibits(input based)
   • Surveys, Polls & Voting: Crowd Voting
   • Neighborhood Knowledge
   • Data collection & Analysis: Crowd “Sourcing”
   • Contests: Crowd Creation
3. Empowerment
   • Referendums Crowd Voting
   • Citizen Juries
   • Delegated decisions
4. Collaboration
   • Collaborative meetings
   • Collaboration(online)
   • Displays/exhibits(interactive)
   • Mediation
   • Visualization software