Source: Systems Engineering Tools, (1965), p. 111 as cited in
“The effectiveness of any model used to describe and understand behavior of a particular system as a whole ultimately depends on the degree to which that model accurately represents that system. Nevertheless, there have been and are situations in which application of deterministic or animate models to social systems have produced useful results for a short period of time. However, in a longer run, such mismatches usually result in less than desirable results because critical aspects of the social systems were omitted in the less complex model that was used.”
Ackoff (1999, p. 34) cited in: Michael C. Jackson (2000) Systems Approaches to Management. p. 234.
1990s
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Russell L. Ackoff 70
Scientist 1919–2009Related quotes
Source: Concepts of the Framework for Enterprise Architecture, 1993, p. 1
Peter Bernus (2003) "Enterprise models for enterprise architecture and ISO9000: 2000." Annual Reviews in Control 27.2 : 211-220.
George (1973) "Soviet Cybernetics, the militairy and Professor Lerner" in: New Scientist (March 15, 1973). Vol. 57, nr. 837. p. 613
Source: 1950s, General Systems Theory - The Skeleton of Science, 1956, p. 197: Opening sentences
p ix-x
Information and Decision Processes (1960)
Source: Systems Engineering Tools, (1965), p. 108; As cited in: Alberto Ortiz (1992, p. 13)

Attributed to Grady Booch in: Tarek M. Sobh (2008) Advances in Computer and Information Sciences and Engineering. p. 457
Source: 1960s, Prisoner's dilemma: A study in conflict and cooperation (1965), p. 150
Source: MDA Distilled. Principles of Model-Driven Architecture, 2003, p. 35-36.