Statistical Process Control Explained
Statistical Process Control (SPC) is a set of tools designed to help reduce variation by identifying the source of variation, taking appropriate corrective action, and verifying the results.

• Dr. Walter Shewhart of Bell Labs developed a theory of Statistical Process Control in 1924.
• During the ’20’s Dr. Shewhart presented his theories in a series of lectures that were published in a book , Economic Control of Quality Manufactured Product (1931).
• SPC came into wide use during the 1940’s as a result of war production efforts.