I think you might consider adding one more workshop group, since the simulation is a closed package, hard to get into unless one is present all the time. I can then do a 15 min presentation of the concept only and very briefly about the simulation, as a plenar session prior to the workshops. So I think the simulation fits neatly into the model 3. More details about the method will be supplied at the event. For now, it is enough to know that participants will be asked to become responsible for a specific role.
Movers are the people who change groups every hour to learn about the issue from a different place.
Doers are in charge of criticizing the feasability or the implementability of the model, while Producers eventually produce the concrete realisation for the presentation of the model. Presenters are in charge of doing the talking at the end. All roles can be self-appointed. Bring your laptops as loaded as possible because there may be some last minute powerpointing. Each group will work on a different but complementary theme.