The key to doing this experiment well is having the right facilitator that brings the attitude. A good facilitator will roleplay a leader/manager/exec that will praise when measures are good and berate when measures are bad. The idea of this experiment is to show how management can harm the process even when there is inherent variability, good or bad.

Here is Dr. Deming himself performing the experiment https://www.youtube.com/watch?v=7pXu0qxtWPg