Solo brainstorming: Before people go to work in their subgroup, they get some time to think on their own, on the task of their subgroup, and if they have an interest for the work of another subgroup, they can also jot down a few ideas. Sub-group work: People share their ideas from their solo brainstorming and prepare a pitch they'll share in 5 minutes to all the other teams. Pitching all together: Each group presents his results, feedback and improvement ideas get collected (for example ideas from the solo brainstorming from people who weren't in that group)