Playing the Game
Take photos of all artifacts before, during, and after the game so that you can track any changes made to the artifacts during the game.
It is much more powerful to convince a skeptical product team that changes are needed when your customer presents their ideas in their own words. To make this easier, encourage your customers to bring extra copies of artifacts created by your system so that you, and they, can edit, annotate, or mark up these artifacts as they wish (use markers, scissors, glue, tape, paper, transparencies, and so on). If the artifacts are expensive to produce, such as when your system helps make teddy bears, sneakers, or portable MP3 players, offer to reimburse your client for artifacts you take with you or ask them to bring mock-ups or even photos.