Source: 1960s, Robots, Men and Minds (1967), p. 69
“The comprehensiveness of OR’s aim is an example of a ‘systems’ approach, since ‘system’ implies an interconnected complex of functionally related components.”
Source: 1940s - 1950s, Introduction to Operations Research (1957), p. 7; cited in Werner Ulrich (2004, p. 210)
Help us to complete the source, original and additional information
C. West Churchman 64
American philosopher and systems scientist 1913–2004Related quotes

We are of course talking here about a man-made system.
The New Economics for Industry, Government, Education (1993)
Source: In Defense of Chaos: The Chaology of Politics, Economics and Human Action, (2013), p. 225

Source: Designing Social Systems in a Changing World (1996), p. 46; as cited in: Charles François (2004), International Encyclopedia of Systems and Cybernetics. p. 164

Michael Halliday (2005, p. 68) as cited in: Andrew Halliday and Marion Glaser (2011) "A Management Perspective on Social Ecological Systems". In: Human Ecology Review, Vol. 18, No. 1, 2011.
1970s and later
As quoted in A Modern Introduction to Logic (1930), p. 198.
Source: Society: A Complex Adaptive System--Essays in Social Theory, (1998), p. 35 as cited in: Kenneth D. Bailey (2006) A Typology of Emergence in Social Systems and Sociocybernetic Theory http://www.unizar.es/sociocybernetics/congresos/DURBAN/papers/bailey.pdf.

Source: Introduction to Systems Philosophy (1972), p. 14.
Source: A Framework for Information Systems Architecture, 1987, p. 276, cited in: CM Pereira (2004), "A method to define an Enterprise Architecture using the Zachman Framework". in: SAC '04 Proceedings of the 2004 ACM symposium on Applied computing. pp. 1366-1371
As cited in: Debora Hammond (2005). "Philosophical and Ethical Foundations of Systems Thinking", in: tripleC 3(2): pp. 20–27.
1950s, Problems of Life (1952, 1960)