“If the assumptions are wrong, the conclusions aren't likely to be very good.”
Cited in: Norman Pascoe (2011) Reliability Technology: Principles and Practice of Failure Prevention in Electronic Systems. Ch. 5
Principles of Operations Research (1975)
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Robert E. Machol 24
American systems engineer 1917–1998Related quotes

"A Native Hill"
The Long-Legged House (1969)
Context: We have lived by the assumption that what was good for us would be good for the world. We have been wrong. We must change our lives, so that it will be possible to live by the contrary assumption that what is good for the world will be good for us... We must recover the sense of the majesty of the creation and the ability to be worshipful in its presence. For it is only on the condition of humility and reverence before the world that our species will be able to remain in it.
Source: An Introduction To Probability Theory And Its Applications (Third Edition), Chapter V, Conditional Probability, Stochastic Independence, p. 136.

F 123
Aphorisms (1765-1799), Notebook F (1776-1779)

Speech at Chapman Law School http://lawandordnance.com/oldbrass/2005/08/the_quotable_sc.php (August 2005).
2000s
The Nurture Assumption, chapter 1, p. 2. http://books.google.com/books?id=-uKBJRMJBjcC&printsec=frontcover#v=onepage&q=%22nurture%22%20as%20a%20synonym%20for%20%22environment%22&f=false http://www.nytimes.com/books/first/h/harris-nurture.html

The Life of Reason: The Phases of Human Progress (1905-1906), Vol. I, Reason in Common Sense