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  2. System dynamics - Wikipedia

    en.wikipedia.org/wiki/System_dynamics

    System dynamics is a methodology and mathematical modeling technique to frame, understand, and discuss complex issues and problems. Originally developed in the 1950s to help corporate managers improve their understanding of industrial processes, SD is currently being used throughout the public and private sector for policy analysis and design.

  3. Growth and underinvestment - Wikipedia

    en.wikipedia.org/wiki/Growth_and_underinvestment

    The system described in the Growth and Underinvestment Archetype consists of three feedback loops. Each feedback loop can be one of two types: [1] Reinforcing loop

  4. Surrogate model - Wikipedia

    en.wikipedia.org/wiki/Surrogate_model

    A surrogate model is an engineering method used when an outcome of interest cannot be easily measured or computed, so an approximate mathematical model of the outcome is used instead.

  5. Dynamical systems theory - Wikipedia

    en.wikipedia.org/wiki/Dynamical_systems_theory

    Dynamical systems theory and chaos theory deal with the long-term qualitative behavior of dynamical systems.Here, the focus is not on finding precise solutions to the equations defining the dynamical system (which is often hopeless), but rather to answer questions like "Will the system settle down to a steady state in the long term, and if so, what are the possible steady states?", or "Does ...

  6. Social constructionism - Wikipedia

    en.wikipedia.org/wiki/Social_constructionism

    Social constructionism is a term used in sociology, social ontology, and communication theory.The term can serve somewhat different functions in each field; however, the foundation of this theoretical framework suggests various facets of social reality—such as concepts, beliefs, norms, and values—are formed through continuous interactions and negotiations among society's members, rather ...

  7. Systems modeling - Wikipedia

    en.wikipedia.org/wiki/Systems_modeling

    In business and IT development the term "systems modeling" has multiple meanings. It can relate to: the use of model to conceptualize and construct systems; the interdisciplinary study of the use of these models

  8. Dynamical system - Wikipedia

    en.wikipedia.org/wiki/Dynamical_system

    Here, T is a monoid (usually the non-negative integers), X is a set, and (X, Σ, μ) is a probability space, meaning that Σ is a sigma-algebra on X and μ is a finite measure on (X, Σ). A map Φ: X → X is said to be Σ-measurable if and only if, for every σ in Σ, one has Φ − 1 σ ∈ Σ {\displaystyle \Phi ^{-1}\sigma \in \Sigma } .

  9. Differentiation (sociology) - Wikipedia

    en.wikipedia.org/wiki/Differentiation_(sociology)

    Exemplifying Differentiation and System Theory, this photographic mosaic may be perceived as a whole/system (a gull) or as a less complex group of parts.. Talcott Parsons was the first major theorist to develop a theory of society consisting of functionally defined sub-systems, which emerges from an evolutionary point of view through a cybernetic process of differentiation.