HOW?  Assemble a diverse group of individuals in a workshop to use a stimulating range of materials and create things that are relevant to your project.

WHY?  This encourages rich, creative, and divergent contributions from potential users, releases inhibitions, and opens up new thinking.

(e.g.  An IDEO team invited an artist, a massage therapist, a podiatrist, an athlete and others to work together to explore and build concepts fro a new range of fashion sandals.)