Thank you for giving access to Dr. Wheeler's seminars.  His articles in Quality Digest are the best articulation of statistics and SPC I have ever read.  The interview helps me understand why.  Teaching SPC to students who have not been involved in manufacturing went largely wasted.  His change to teaching manufacturing employees and managers SPC demonstrated great benefits with real life examples.  This is pragmatism at its finest, ala Charles Peirce another teacher who became grounded in the real world before writing about philosophy of mathematics and science.  It offers some personal satisfaction for having chosen a career in manufacturing after my graduate degree rather than moving to another university to teach theory.  My greatest satisfaction came while being Technical Director of a large paper mill.  It offered the opportunity to take action and see results.