In his later years, Deming taught many concepts, which he emphasized by key sayings or quotations that he repeated, although some of the concepts appear to be contradictory to each other. A number of these quotes are listed below: · "There is no substitute for knowledge." This statement emphasizes the need to know more, about everything in the system. Previously, the statement, "There is no substitute for hard work" by Thomas Alva Edison (1847–1931) was the byword of industry. Deming suggested that instead, a small amount of knowledge could save many hours of hard work. · "In God we trust; all others must bring data." · "The most important things cannot be measured." The issues that are most important, long term, cannot be measured in advance. However, they might be among the factors that an organization is...