“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.”

Part One, chapter 4, page 18
Why Government Doesn't Work (1995)

Minister critical of delays in Airport Rail construction (2013)

R. Buckminster Fuller on Education (University of Massachusetts Press, 1979), p. 130
1970s
Context: Up to the Twentieth Century, reality was everything humans could touch, smell, see, and hear. Since the initial publication of the chart of the electromagnetic spectrum, humans have learned that what they can touch, smell, see, and hear is less than one-millionth of reality. Ninety-nine percent of all that is going to affect our tomorrows is being developed by humans using instruments and working in ranges of reality that are nonhumanly sensible.

Stopped in Our Tracks, Book Two: Excerpts from U.G.'s Dialogues (2005) by K. Chandrasekhar

Quoted in William Kenneth Richmond (1969), The Education Industry.
May be modern paraphrase of "the errors which arise from the absence of facts" quote above.
Attributed

Source: 1980s, That Benediction is Where You Are (1985), p. 18
Context: From childhood we are trained to have problems. When we are sent to school, we have to learn how to write, how to read, and all the rest of it. How to write becomes a problem to the child. Please follow this carefully. Mathematics becomes a problem, history becomes a problem, as does chemistry. So the child is educated, from childhood, to live with problems — the problem of God, problem of a dozen things. So our brains are conditioned, trained, educated to live with problems. From childhood we have done this. What happens when a brain is educated in problems? It can never solve problems; it can only create more problems. When a brain that is trained to have problems, and to live with problems, solves one problem, in the very solution of that problem, it creates more problems. From childhood we are trained, educated to live with problems and, therefore, being centred in problems, we can never solve any problem completely. It is only the free brain that is not conditioned to problems that can solve problems. It is one of our constant burdens to have problems all the time. Therefore our brains are never quiet, free to observe, to look. So we are asking: Is it possible not to have a single problem but to face problems? But to understand those problems, and to totally resolve them, the brain must be free.

Source: Collapse: How Societies Choose to Fail or Succeed (2005), Chapter "The world as a polder: what does it all mean to us today?", section "Reasons for hope" (Penguin Books, 2011, pages 521-522, ISBN 978-0-241-95868-1.

Commencement address at the Romanian Military Academy (14 August 1968), quoted in The Prague Spring (2010) by M. Mark Stolarik

Nearly identical quote attributed to a 1995 TV show, Touched by an Angel https://www.imdb.com/title/tt0732136/quotes: Tess: No, hate has caused a lot of problems in this world, but it's never solved one yet.
Misattributed