As influential as SPC is, this is not the only contribution made by Shewhart. He planted ideas in the head of Deming that were later turned into the management concepts that Deming took to Japan and finally brought home in the 1980's. One of these ideas was the concept of Profound Knowledge, an idea discussed later in the section on Deming.
An idea that is commonly credited to Deming, but in actuality belongs to Shewhart is the PDCA (or PDSA) cycle of management. This is the Plan-Do-Check (or Study)-Act cycle that should be used for all management projects. Plan what you want to do, do it, study the results, make corrections, and then plan for the improvements (starting the cycle again).
Walter A. Shewhart could be considered the "Father of Quality." This title is most often associated with W. Edwards Deming, but Deming learned "at the feet" of Shewhart. Shewhart laid the first seed of the quality movement with his book "Economic Control of Quality of Manufactured Product." This book introduced the concept of Statistical Process Control. SPC has become the cornerstone for process control in industry.
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