Have a group of participants think about the following scenario: “The Delta Corporation is in trouble. One of its best products, the portable z - phone, is not selling well even while related products from Apple and other companies are selling very well.”

Divide the participants into groups of about five. First, have each person work alone to list all the reasons why the product might not be selling. Then have each group combine ideas from all members (discarding those they think are preposterous). Count how many more ideas the group as a whole had as compared to each individual member, including the best member. If there is time, see if the groups combined did better than any one group. Further, there could be a discussion of what actions to take on each of the ideas presented.