Template:Complex systems Systems thinking is a way of making sense of the complexity of the world by looking at it in terms of wholes and relationships rather than by splitting it down into its parts.<ref name="andersonJohnson1997">Anderson, Virginia, & Johnson, Lauren (1997). Systems Thinking Basics: From Concepts to Causal Loops. Waltham, Mass: Pegasus Comm., Inc.</ref><ref>Magnus Ramage and Karen Shipp. 2009. Systems Thinkers. Springer.</ref> It has been used as a way of exploring and developing effective action in complex contexts,<ref>Introduction to Systems thinking. Report of GSE and GORS seminar. Civil Service Live. 3 July 2012. Government Office for Science.</ref> enabling systems change.<ref name="stem">Sarah York, Rea Lavi, Yehudit Judy Dori, and MaryKay Orgill Applications of Systems Thinking in STEM Education J. Chem. Educ. 2019, 96, 12, 2742–2751 Publication Date:May 14, 2019 https://doi.org/10.1021/acs.jchemed.9b00261</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Systems thinking draws on and contributes to systems theory and the system sciences.<ref name="ackoff">Systemic Thinking 101 Russell L Ackoff From Mechanistic to Systemic thinking, also awal street journal (2016) Systems Thinking Speech by Dr. Russell Ackoff 1:10:57</ref>
HistoryEdit
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Ptolemaic system versus the Copernican systemEdit
The term system is polysemic: Robert Hooke (1674) used it in multiple senses, in his System of the World,<ref name="hooke1674" />Template:Rp but also in the sense of the Ptolemaic system versus the Copernican system<ref name="marchal" />Template:Rp of the relation of the planets to the fixed stars<ref name="voisey">Jon Voisey Universe Today (14 Oct 2022) Scholarly History of Ptolemy’s Star Catalog Index</ref> which are cataloged in Hipparchus' and Ptolemy's Star catalog.<ref>Jessica Lightfoot Greek, Roman, and Byzantine Studies 57 (2017) 935–9672017 Hipparchus Commentary On Aratus and Eudoxus </ref> Hooke's claim was answered in magisterial detail by Newton's (1687) Philosophiæ Naturalis Principia Mathematica, Book three, The System of the World<ref name="systemateMundi">Newton, Isaac (1687) Philosophiæ Naturalis Principia Mathematica</ref>Template:Rp (that is, the system of the world is a physical system).<ref name="hooke1674">Hooke, Robert (1674) An attempt to prove the motion of the earth from observations </ref>
Newton's approach, using dynamical systems continues to this day.<ref name="marchal">Template:Cite journal as reprinted in Gerald Midgely (ed.) (2002) Systems thinking vol One</ref> In brief, Newton's equations (a system of equations) have methods for their solution.
Feedback control systemsEdit
By 1824, the Carnot cycle presented an engineering challenge, which was how to maintain the operating temperatures of the hot and cold working fluids of the physical plant.<ref name="carnot1824">Sadi Carnot (1824) Reflections on the Motive Power of Fire</ref> In 1868, James Clerk Maxwell presented a framework for, and a limited solution to, the problem of controlling the rotational speed of a physical plant.<ref name="jcmaxwell1868">James Clerk Maxwell (1868) On Governors 12 pages</ref> Maxwell's solution echoed James Watt's (1784) centrifugal moderator (denoted as element Q) for maintaining (but not enforcing) the constant speed of a physical plant (that is, Q represents a moderator, but not a governor, by Maxwell's definition).<ref name="mayr1971">Otto Mayr
(1971) Maxwell and the Origins of Cybernetics Isis, Vol. 62, No. 4 (Winter, 1971), pp. 424-444 (21 pages)</ref>Template:Efn
Maxwell's approach, which linearized the equations of motion of the system, produced a tractable method of solution.<ref name="mayr1971" />Template:Rp Norbert Wiener identified this approach as an influence on his studies of cyberneticsTemplate:Efn during World War II<ref name="mayr1971" /> and Wiener even proposed treating some subsystems under investigation as black boxes.<ref name="ontologyOfTheEnemy">Peter Galison (1994) The Ontology of the Enemy: Norbert Wiener and the Cybernetic Vision Critical Inquiry, Vol. 21, No. 1 (Autumn, 1994), pp. 228–266 (39 pages) JSTOR</ref>Template:Rp Methods for solutions of the systems of equations then become the subject of study, as in feedback control systems, in stability theory, in constraint satisfaction problems, the unification algorithm, type inference, and so forth.
ApplicationsEdit
- "So, how do we change the structure of systems to produce more of what we want and less of that which is undesirable? ... MIT’s Jay Forrester likes to say that the average manager can ... guess with great accuracy where to look for leverage points—places in the system where a small change could lead to a large shift in behavior".<ref name="meadows2008">Donella Meadows, (2008) Thinking In Systems: A Primer</ref>Template:Rp— Donella Meadows, (2008) Thinking In Systems: A Primer p.145 Template:Efn
CharacteristicsEdit
Template:AnchorTemplate:Quote Template:Quote
- Template:AnchorSubsystems serve as part of a larger system, but each comprises a system in its own right. Each frequently can be described reductively, with properties obeying its own laws, such as Newton's System of the World, in which entire planets, stars, and their satellites can be treated, sometimes in a scientific way as dynamical systems, entirely mathematically, as demonstrated by Johannes Kepler's equation (1619) for the orbit of Mars before Newton's Principia appeared in 1687.
- Template:AnchorBlack boxes are subsystems whose operation can be characterized by their inputs and outputs, without regard to further detail.<ref name="meadows2008" />Template:Rp<ref name="bbw">Wiener, Norbert; Cybernetics: Or the Control and Communication in the Animal and the Machine, MIT Press, 1961, ISBN 0-262-73009-X, page xi</ref>
Particular systemsEdit
- Political systems were recognized as early as the millennia before the common era.<ref name="aristotlePolitics">Aristotle, Politics</ref><ref>JS Maloy (2009) The Aristotelianism of Locke's Politics Journal of the History of Ideas, Vol. 70, No. 2 (April 2009), pp. 235–257 (23 pages)</ref>
- Biological systems were recognized in Aristotle's lagoon ca. 350 BCE.<ref>Aristotle, History of Animals</ref><ref name="Lennox">{{#invoke:citation/CS1|citation
|CitationClass=web }}</ref>
- Economic systems were recognized by 1776.<ref name="smith76">Adam Smith (1776) The Wealth of Nations Book IV refers to commercial, and mercantile systems, as well as to systems of political enonomy</ref>
- Social systems were recognized by the 19th and 20th centuries of the common era.<ref>Max Weber, The Protestant Ethic and the Spirit of Capitalism</ref><ref>Talcott Parsons, The Structure of Social Action</ref>
- Radar systems were developed in World War II in subsystem fashion; they were made up of transmitter, receiver, power supply, and signal processing subsystems, to defend against airborne attacks.<ref>MIT Radiation Laboratory, MIT Radiation Laboratory Series, 28 volumes</ref>
- Dynamical systems of ordinary differential equations were shown to exhibit stable behavior given a suitable Lyapunov control function by Aleksandr Lyapunov in 1892.<ref name="pates">Richard Pates (2021) What is a Lyapunov function</ref>
- Thermodynamic systems were treated as early as the eighteenth century, in which it was discovered that heat could be created without limit, but that for closed systems, laws of thermodynamics could be formulated.<ref name="beingatoBecoming">Template:Cite book 272 pages.</ref> Ilya Prigogine (1980) has identified situations in which systems far from equilibrium can exhibit stable behavior;<ref name="G&P1971">Glansdorff, P., Prigogine, I. (1971). Thermodynamic Theory of Structure, Stability and Fluctuations, London: Wiley-Interscience Template:ISBN</ref> once a Lyapunov function has been identified, future and past can be distinguished, and scientific activity can begin.<ref name="beingatoBecoming" />Template:Rp
Systems far from equilibriumEdit
Template:Anchor Living systems are resilient,<ref name="ah3" /> and are far from equilibrium.<ref name="meadows2008"/>Template:Rp<ref name="G&P1971" /> Homeostasis is the analog to equilibrium, for a living system; the concept was described in 1849, and the term was coined in 1926.<ref name="wotb">Template:Cite book</ref><ref name="cannon">Template:Cite book</ref>
Template:Anchor Resilient systems are self-organizing;<ref name="ah3" />Template:Efn<ref name="meadows2008" />Template:Rp <ref>H T Odum (25 Nov 1988) Self-Organization, Transformity and Information Science Vol 242, Issue 4882 pp. 1132–1139 as reprinted by Gerald Midgley ed. (2002), Systems Thinking vol 2</ref>
Template:Anchor The scope of functional controls is hierarchical, in a resilient system.<ref name="ah3" /><ref name="meadows2008" />Template:Rp
Frameworks and methodologiesEdit
Frameworks and methodologies for systems thinking include:
- Critical systems heuristics:<ref name="ulrich" >{{#invoke:citation/CS1|citation
|CitationClass=web }}</ref> in particular, there can be twelve boundary categories for the systems when organizing one's thinking and actions.
- Critical systems thinking, including the E P I C approach.
- DSRP, a framework for systems thinking that attempts to generalise all other approaches.
- Ontology engineering of representation, formal naming and definition of categories, and the properties and the relations between concepts, data, and entities.
- Soft systems methodology, including the CATWOE approach and rich pictures.
- Systemic design, for example using the double diamond approach.
- System dynamics of stocks, flows, and internal feedback loops.
- Viable system model: uses 5 subsystems.
See alsoEdit
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NotesEdit
ReferencesEdit
SourcesEdit
- Russell L. Ackoff (1968) "General Systems Theory and Systems Research Contrasting Conceptions of Systems Science." in: Views on a General Systems Theory: Proceedings from the Second System Symposium, Mihajlo D. Mesarovic (ed.).
- A.C. Ehresmann, J.-P. Vanbremeersch (1987) Hierarchical evolutive systems: A mathematical model for complex systems" Bulletin of Mathematical Biology Volume 49, Issue 1, Pages 13–50
- NJTA Kramer & J de Smit (1977) Systems thinking: Concepts and Notions, Springer. 148 pages
- A. H. Louie (November 1983) "Categorical system theory" Bulletin of Mathematical Biology volume 45, pages 1047–1072
- DonellaMeadows.org Systems Thinking Resources
- Gerald Midgley (ed.) (2002) Systems Thinking, SAGE Publications. 4 volume set: 1,492 pages List of chapter titles
- Robert Rosen. (1958) “The Representation of Biological Systems from the Standpoint of the Theory of Categories". Bull. math. Biophys. 20, 317–342.
- Peter Senge, (1990) The Fifth Discipline