The first system was Quality Control, a statistically based system created by
scientists at the Bell Laboratories during World War II. It was designed to take
quantitative measurements of a process and plot these measurements on a graph, with the
objective of “controlling”: the process. A standard deviation, called sigma, was
conceived, with the acceptable quality level for manufacturing operations put initially at
three sigma and later at six sigma. The weakness of quality control, though, is that the
emphasis is placed on corrective activity, with scant concern for the preventive action
required for the best results.
The first system was Quality Control, a statistically based system created byscientists at the Bell Laboratories during World War II. It was designed to take quantitative measurements of a process and plot these measurements on a graph, with theobjective of “controlling”: the process. A standard deviation, called sigma, wasconceived, with the acceptable quality level for manufacturing operations put initially at three sigma and later at six sigma. The weakness of quality control, though, is that theemphasis is placed on corrective activity, with scant concern for the preventive actionrequired for the best results.
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