FACTOID # 21: 15% of Army recruits from South Dakota are Native American, which is roughly the same percentage for female Army recruits in the state.

 Home Encyclopedia Statistics States A-Z Flags Maps FAQ About

 WHAT'S NEW

SEARCH ALL

Search encyclopedia, statistics and forums:

(* = Graphable)

Encyclopedia > Causal loop diagram

A causal loop diagram(CLD) is a diagram that aids in visualizing how interrelated variables affect one another. The diagram consists of a set of nodes representing the variables connected together. The relationships between these variables, represented by arrows, can be labelled as positive or negative. In computer science and mathematics, a variable is a symbol denoting a quantity or symbolic representation. ... The term node can refer to: Node, a spatial locus along a standing wave where the wave has minimal amplitude. ...

For example, your savings account could be shown as a simple system consisting of two nodes, Bank Balance and Earned Interest:

`  `

The amount of the Bank Balance will affect the amount of the Earned Interest as represented by an arrow pointing from Bank Balance to Earned Interest. Since an increase in Bank Balance result in an increase in Earned Interest, this link is positive (which can be denoted with a ""+""). The Earned Interest gets added to the Bank Balance (also a positive link). The causal affect between these nodes forms a positive reinforcing loop (which can be denoted with an ""R"").

Identifying reinforcing and balancing loops is an important step for identifying Reference Behaviour Patterns, i.e. possible dynamic behaviours of the system. A reinforcing loop is associated with an exponential increase/decrease. Balancing loops are associated with reaching a plateau. If the system has delays (often denoted by drawing a short line across the causal link), the system might fluctuate.

System Dynamics is an approach to understanding the behaviour of complex systems over time. ...

Share your thoughts, questions and commentary here