A person begins by proposing an idea that will solve the challenge to be faced. The next member should offer another idea complementary to the previous one, and so on until no member can string together any more ideas.

Example: Faced with the challenge of increasing the social circle of friends, a group of migrant people proposed the following ideas: Going to meeting points where they can find people to meet (gyms, cafeterias, parks). For this purpose, they use social networks to establish contacts and discover the main meeting points in that city.