Wheeler serves up the best concise easily understood description I have ever seen for both statistical process control and the Deming management philosophy. No executive or manager responsible for imporving an organization can afford ignorance of the information in this compact volume. A leader blessed with competent statisticians may find that Wheeler's book suffices without other material covering the matter in greater depth. Leaders lacking support from statistically sophisticated staff may feel a need to stiffen their understanding with Deming's _Out of the Crisis_ and _The New Economics for Industry, Government, Education_. Even without a thorough understanding of continuous improvement philosophy, Wheeler's book, properly applied to your business, should easily offer an RoI well over 1,000,000%.