Product quality can then be defined as: The composite product characteristics of engineering and manufacturing that determine the degree to which the… - Armand V. Feigenbaum

In the phrase "quality control" the word quality does not have the popular meaning of "best" in any absolute sense. It means "best for certain customer conditions." These conditions are (a) the actual use and (b) the selling price of the product. Product quality cannot be thought of apart from product cost.

The outstanding quality accomplishments of industry during the past decade are familiar history. Particularly during World War II, the accomplishments made by the precision equipment in our tanks and guns and planes were indelibly impressed upon the entire world. This results side of the quality picture makes impressive reading.

Engineers, scientists, and statisticians have, until recently, been the groups chiefly interested in activity called quality control. These technologists have been primarily concerned with the technical methods which have become associated with the subject. They have applied these methods to a number of industrial quality problems.