Saidbook

90 percent of all problems can be solved by using the techniques of data stratification, histograms, and control charts. Among the causes of nonconformance, only one-fifth or less are attributable to the workers.

— Kaoru Ishikawa The Quality Management Journal. Vol. 1 (1993)

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Attribution

Quote text and notes from Wikiquote: Kaoru Ishikawa (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.