“Formulating a model of a system should start from the question “Where is the boundary, that encompasses the smallest number of components, within which the dynamic behavior under study is generated?””

— Jay Wright Forrester

Source: Principles of Systems (1968), p. 4-2; as cited in Richardson (2011)

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Jay Wright Forrester 7

American operations researcher 1918–2016

Jay Wright Forrester (1918–2016) American operations researcher

Source: Principles of Systems (1968), p. 4-1 as cited in: Richardson, George P. " Reflections on the foundations of system dynamics http://obssr.od.nih.gov/issh/2012/files/Richardson%202011.pdf." System Dynamics Review 27.3 (2011): 219-243.

“Since it can be argued that both science and engineering are concerned with the study of real systems and their behavior, it follows that a general theory should be concerned with the study of general systems… It suffices for the present discussion to consider a general system as an abstract analogue or model of a class of real systems. General systems theory is then a theory of general models.”

Mihajlo D. Mesarovic (1928) Serbian academic

Mesarovic (1964) cited in: Shatrughna P. Sinha (1991) Instant encyclopaedia of geography. 1. Introduction to geography. Mittal Publications, p. 467

“Object-oriented design is a method of design encompassing the process of object-oriented decomposition and a notation for depicting both logical and physical as well as static and dynamic models of the system under design.”

Grady Booch (1955) American software engineer

Source: Object-oriented design: With Applications, (1991), p. 37

“In brief, nationalism is a theory of political legitimacy, which requires the ethnic boundaries should not be cut across political ones, and, in particular, that ethnic boundaries within a given state — a contingency already formally excluded by the principle in its general formulation — should not separate the power holders from the rest.”

Ernest Gellner (1925–1995) Czech anthropologist, philosopher and sociologist

Source: Nations and Nationalism (1983), Chapter 1, Definitions, p. 1

“Thus, there exist models, principles, and laws that apply to generalized systems or their subclasses, irrespective of their particular kind, the nature of their component elements, and the relations or „forces‟ between them. It seems legitimate to ask for a theory, not of systems of a more or less special kind, but of universal principles applying to systems in general. In this way, we postulate a new discipline called General Systems Theory. Its subject matter is the formulation and derivation of those principles, which are valid for „systems‟ in general.”

Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher

Source: General System Theory (1968), 2. The Meaning of General Systems Theory, p. 32

“# "An operationally definable, objective, non-anthropomorphic study of purposiveness, goal-seeking system behavior, symbolic cognitive processes, consciousness and self-awareness, and sociocultural emergence and dynamics in general.”

Walter F. Buckley (1922–2006) American sociologist

Source: Sociology and modern systems theory (1967), p. 39 as cited in: Joyce Aschenbrenner, Lloyd R. Collins (1978) The Processes of Urbanism: A Multidisciplinary Approach http://books.google.nl/books?id=qC4hN9zpgI0C&pg=PA383. p. 383.

“Synergy means behavior of integral, aggregate, whole systems unpredicted by behaviors of any of their components or subassemblies of their components taken separately from the whole.”

Buckminster Fuller (1895–1983) American architect, systems theorist, author, designer, inventor and futurist

102.00 http://www.rwgrayprojects.com/synergetics/s01/p0100.html
1970s, Synergetics: Explorations in the Geometry of Thinking (1975), "Synergy" onwards

“A system is a set of objects with relationships between the … in may be described generally as a complex of elements or components directly or indirectly related in a causal network, … Also, we are mainly interested in systems within which some process is continually going on, including an interchange with an environment across the boundary. It is generally agreed that when we deal with the more open system with a highly flexible structure, the distinction between the boundaries and the environment becomes a more and more arbitrary matter, dependent upon the purpose of the observer.”

Arthur D. Hall (1925–2006) American electrical engineer

Cited in: Addison C. Bennett (1978) Improving management performance in health care institutions: a total systems approach.. p. 40
A methodology for systems engineering, 1962

“No matter how abstractly formulated are a general theory of systems, a general theory of evolution and a general theory of communication, all three theoretical components are necessary for the specifically sociological theory of society. They are mutually interdependent.”

Niklas Luhmann (1927–1998) German sociologist, administration expert, and social systems theorist

Luhmann (1982) The Differentiation of Society, Translated by Stephen Holmes and Charles Larmore. Columbia University Press, New York, 1982, pp. 261. Cited in: Loet Leydesdorff (2000) " Luhmann, Habermas, and the Theory of Communication http://www.leydesdorff.net/montreal.htm".

“It is necessary to study not only parts and processes in isolation, but also to solve the decisive problems found in organization and order unifying them, resulting from dynamic interaction of parts, and making the the behavior of the parts different when studied in isolation or within the whole.”

Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher

Source: General System Theory (1968), 2. The Meaning of General Systems Theory, p. 31

“Formulating a model of a system should start from the question “Where is the boundary, that encompasses the smallest number of components, within which the dynamic behavior under study is generated?””

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