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STELLA (short for Systems Thinking, Experimental Learning Laboratory with Animation; also marketed as iThink) is a visual programming language for system dynamics modeling introduced by Barry Richmond in 1985. The program, distributed by isee systems (formerly High Performance Systems) allows users to run models created as graphical ...
Modelica is an object-oriented, declarative, multi-domain modeling language for component-oriented modeling of complex systems. Next to the free System Dynamics library, which is exclusively based on modeling signal flows, there is a free Business Simulation Library (BSL) dedicated to System Dynamics, which makes use of Modelica's acausal ...
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.
AnyLogic models can be based on any of the main simulation modeling paradigms: discrete event or process-centric (DE), [74] systems dynamics (SD), [75] and agent-based (AB). [7] System dynamics and discrete events are traditional simulation approaches, agent based is a newer one.
The work is heavily influenced by the work of Jay Forrester and the MIT Systems Dynamics Group, whose World3 model formed the basis of analysis in Limits to Growth. [ 3 ] In addition, Meadows drew on a wide range of other sources for examples and illustrations, including ecology , management , farming and demographics ; as well as taking ...
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. [ 1 ] [ 2 ] It has been used as a way of exploring and developing effective action in complex contexts, [ 3 ] enabling systems change .
Born in Elgin, Illinois, Meadows was educated in science, receiving a B.A. in chemistry from Carleton College in 1963 and a PhD in biophysics from Harvard in 1968. After a yearlong trip from England to Sri Lanka and back, she became a research fellow at the Massachusetts Institute of Technology as a member of a team in the department created by Jay Forrester, the inventor of system dynamics as ...
In 1984 he founded High Performance Systems, Inc (HPS), in 2004 renamed to ISEE Systems, and was CEO until his death in 2002. Richmond has also been an associate editor of the journal "Systems dynamics" and "Simulation". [5] In 2007, ISEE Systems established the "Barry Richmond Scholarship Award" to honor and continue the legacy of its founder.