Now back to the left brain. Sometimes a really outstanding idea will emerge. Otherwise there may be several candidates. Some of these candidates may need further investigation before they can be recommended. (In the above example, is it feasible or possible to introduce some sort of metal reinforcement?). Beware of throwing out ideas too early - the best ideas are often a development from an apparently poor idea. So take time to discuss them. In some cases it may be necessary for the team to take a break while more technical feasibility is evaluated or costs determined, by specialists.

There are several ways to evaluate. Pairwise comparison with multi-discipline group discussion is good possibility. Another possibility is to write all ideas on cards, then give a set of cards to pairs of group members, and ask each pair to come up with the best two ideas. Then get the full group to discuss all the leading ideas. Yet another is to draw up a cost-benefit chart (cost along one axis, benefits along another). Ask the group members to plot the locations of ideas on the chart. There is no reason why several of these methods cannot be used together. Do what makes the group happy - it is their project and their ideas.