File:Feedback Loops in a System Dynamics Model.jpg
Original file (821 × 538 pixels, file size: 41 KB, MIME type: image/jpeg)
Captions
Summary[edit]
DescriptionFeedback Loops in a System Dynamics Model.jpg |
English: Feedback Loops in a System Dynamics Model
The world that analysts attempt to simulate is more complicated than that, as this figure suggests. The bold loop in the figure is the classic cybernetic loop, striving to bring the state of the system toward some set goal. However, unstated goals often intervene and unintended effects are triggered. The system changes from its own forces, and all sorts of effects feed back to alter the actions of the actors. (In a system dynamics perspective, there are no “side” effects, only effects.) Moreover, complex systems have many actors, each with personal or organizational goals, so this structure is repeated countless times in real systems. The result is that actions one group takes to reach toward its goals disturb the system and prompt other groups to implement counteraction, striving to reassert the status quo or lead to a different status quo. In contrast, the simpler cause-and-effect behavior can result when these factors are held constant. Thus, a system often will compensate for changes and weaken or even negate them, much as a price cut can stimulate competitive forces that negate its original goal of increasing sales. This phenomenon is referred to as policy resistance. |
Date | |
Source | Tobacco Control Monographs 18: Greater Than the Sum: Systems Thinking in Tobacco Control Chapter 5 |
Author | National Cancer Institute |
Licensing[edit]
Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
|
||
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 22:22, 23 November 2008 | 821 × 538 (41 KB) | Mdd (talk | contribs) | == Summary == {{Information |Description={{en|1=Feedback Loops in a System Dynamics Model The world that analysts attempt to simulate is more complicated than that, as this figure suggests. The bold loop in the figure is the classic cybernetic loop, str |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
_error | 0 |
---|