Courtesy of an email from Jeff Rients (thanks, Jeff!) comes this link to a post by Dr. Rotwang: The Adventure Funnel.

It’s a method of scenario creation that revolves around successive steps of brainstorming, each of which refines the previous step. It reminded me not only of a funnel, but also of those funnel-shaped bags you use to squeeze out icing for cakes.

At the end of the adventure funnel process, you’re left with delicious adventure icing, blended from the best elements of your brainstorming. It looks like a sound approach — check it out.