„A system may actually exist as a natural aggregation of component parts found in Nature, or it may be a man-contrived aggregation – a way of looking at a problem which results from a deliberate decision to assume that a set of elements are related and constitute such a thing called ‘a system.“

—  Charles West Churchman, 1960s - 1970s, C. West Churchman, , I. Auerbach, and Simcha Sadam (1975) Thinking for Decisions Deduction Quantitative Methods. Science Research Associates. cited in: John P. van Gigch (1978) Applied General Systems Theory. Harper & Row Publishers
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Citações relacionadas

Ervin László photo

„Let us begin by observing that the word "system" is almost never used by itself; it is generally accompanied by an adjective or other modifier: physical system; biological system; social system; economic system; axiom system; religious system; and even "general" system. This usage suggests that, when confronted by a system of any kind, certain of its properties are to be subsumed under the adjective, and other properties are subsumed under the "system," while still others may depend essentially on both. The adjective describes what is special or particular; i. e., it refers to the specific "thinghood" of the system; the "system" describes those properties which are independent of this specific "thinghood."
This observation immediately suggests a close parallel between the concept of a system and the development of the mathematical concept of a set. Given any specific aggregate of things; e. g., five oranges, three sticks, five fingers, there are some properties of the aggregate which depend on the specific nature of the things of which the aggregate is composed. There are others which are totally independent of this and depend only on the "set-ness" of the aggregate. The most prominent of these is what we can call the cardinality of the aggregate…
It should now be clear that system hood is related to thinghood in much the same way as set-ness is related to thinghood. Likewise, what we generally call system properties are related to systemhood in the same way as cardinality is related to set-ness. But systemhood is different from both set-ness and from thinghood; it is an independent category.“

—  Robert Rosen American theoretical biologist 1934 - 1998
"Some comments on systems and system theory," (1986), p. 1-2 as quoted in George Klir (2001) Facets of Systems Science, p. 4

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„:1) A mind is an aggregate of interacting parts or components.“

—  Gregory Bateson English anthropologist, social scientist, linguist, visual anthropologist, semiotician and cyberneticist 1904 - 1980
Mind and Nature: A Necessary Unity, 1979

Buckminster Fuller photo

„Newton achieved the clearest appreciation of the relation between the empirical elements in a scientific system and the hypothetical elements derived from a philosophy of nature.“

—  Alistair Cameron Crombie Australian zoologist, historian of science 1915 - 1996
Alistair Cameron Crombie, as quoted by John Freely in Before Galileo; The Birth of Modern Science in Medieval Europe http://books.google.com/books?id=MfhjAAAAQBAJ (2012).

Russell L. Ackoff photo
Russell L. Ackoff photo
Jean-Baptiste Say photo

„While we can conceive of a sum [or aggregate] as being composed gradually, a system as a total of parts with its [multiplicative] interrelations has to be conceived of as being composed instantly.“

—  Ludwig von Bertalanffy austrian biologist and philosopher 1901 - 1972
General System Theory (1968), 3. Some System Concepts in Elementary Mathematical Consideration, p. 55 as cited in: Anthony Wilden (2003) System and Structure: Essays in Communication and Exchange. p. 245

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