If time is limited for working with the matrix, the analysis can focus only on the SDGs. These can be added to the cards that name the challenges and opportunities.
This exercise is ideal when different cities are participating. However, it is also possible to use it for only one city. In this case, try to form 2 to 4 groups of participants to allow for some discussion.
Ideally the group should be composed of experts from different city departments (planning, finance, mobility, education, health, public works, etc.) as well as different stakeholders (civil society, academia, NGOs etc.).