Is an arena group a permanent group?

In principle, a transition group is a closed group, which means that the members of the group remain the same. One reason for this is that trust has to be established between the participants. Another reason is the need to maintain sufficient continuity in the development of ideas. Nevertheless, the composition of the group will change over time. The changes will often occur more or less naturally, but may also be the result of a conscious decision. For example, there may be a parting of the ways at some point with participants who persist in thinking mainly in terms of their own direct interests. Alternatively, you might want to introduce new participants because a new perspective is needed or because the arena group is about to draft an action plan and needs practical know-how. For example, when it is time to write an action plan you will often need more input from regime actors, since they will play an important role in putting new practices into effect.