Source: 1940s - 1950s, Introduction to Operations Research (1957), p. 7; cited in Werner Ulrich (2004, p. 210)
“What is a system? A system is a network of interdependent components that work together to try to accomplish the aim of the system. A system must have an aim. Without an aim, there is no system. The aim of the system must be clear to everyone in the system. The aim must include plans for the future. The aim is a value judgment.”
We are of course talking here about a man-made system.
The New Economics for Industry, Government, Education (1993)
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W. Edwards Deming 33
American professor, author, and consultant 1900–1993Related quotes

The New Economics for Industry, Government, Education (1993)

The New Economics for Industry, Government, Education (1993)
David Krakauer, conversation with Manuel Stagars on August 2017. https://www.facebook.com/santafeinstitute/videos/10154706225981058/

Francis Heylighen, 1990, "Classical and non-classical representations in physics I." Cybernetics and Systems 21. p. 423; As cited by: Hieronymi, A. (2013), Understanding Systems Science: A Visual and Integrative Approach. Syst. Res.. doi: 10.1002/sres.2215

Bk I, Ch I
The Ethics Of Aristotle (Vol. I)

How to Ace an Exam, The American Spectator, 15 December 2004 http://www.spectator.org/dsp_article.asp?art_id=7511,], 2006-11-19]

Memoirs of J. Casanova de Seingalt (1894)
Context: The reader of these Memoirs will discover that I never had any fixed aim before my eyes, and that my system, if it can be called a system, has been to glide away unconcernedly on the stream of life, trusting to the wind wherever it led. How many changes arise from such an independent mode of life!

Pt. II, ch. 10, sec. 1.
1920s, Process and Reality: An Essay in Cosmology (1929)