You Cannot Install Quality Control

From W. Edwards Deming, Out of the Crisis, 2nd ed. (MIT Press, 2000), page 138. The book originated as Quality, Productivity, and Competitive Position (1982, MIT Center for Advanced Engineering Study) and was renamed Out of the Crisis in 1986, gathering the case Deming had been making in his four-day seminars for American executives. The book lays out his 14 Points for Management and Seven Deadly Diseases, with the underlying argument that the West’s quality problem is a management problem, not a worker problem.

The target is the idea that quality can be procured. “We installed quality control” treats quality like a copier or a new department: pick a vendor, allocate floor space, hire the staff, declare it done. Deming’s argument across the book is that quality is a property of the whole production system, the result of statistical control over variation, design choices, supplier relationships, training, and ongoing measurement. A quality-control department welded onto a system that does not pursue quality at every stage cannot manufacture the outcome by inspection; it can only sort what the system already produced. Anyone offering to “install” it has misunderstood what it is.