This model introduces the S/O and +/- notation for depicting the relations that might exist between two elements along with why the +/- notation is preferred.
We are embedded in a larger system and unless we realize it an act accordingly we are likely to be the victim of it. From Introduction to System Dynamics: Overview by John Sterman
This Savings Model is the third in the series. It illustrates the difference in savings over time for a doctor or for a skilled worker who went to a trade school.
Purpose: Employ the Mono Lake model adapted from "Modeling the Environment" by Andrew Ford as a basis for developing a set of guidelines to support asynchronous multi-user model development.
Mono Lake is an ancient inland sea on the eastern side of the Sierra Nevada. From a policy point of view Mono Lake is the story of how a handful of people began a campaign to save a dying lake
The limits to action structure endeavors to bring a balance between a current state and a desired state though more often than not there is some limit on the action.
Faced with a performance gap the two most obvious responses are to work harder or work smarter. There are trade offs associated with each, some obvious, some not so obvious.
The issue of increasing private and government debt to banks is a major
concern after the financial crisis of 2008 (see Figure at link given below). In order to
understand why our society and government is increasingly indebted to banks we
need to understand how our current money system works and why we need a
continuous infusion of new money in a growing economy. “Why We Are Increasingly
Indebted To Banks?” investigates the reasons behind this and suggest a possible
solution.
At this stage it is essential to understand and admit that the task at hand completely overwhelms the current methods. The way forward lies in realizing the essential nature of collaboration and the need for an integrated tool set to support collaboration. Even with that as the realization, current understanding indicates that the integrated tool set necessary to support the needed collaboration simply does not exist. And, not only does it not exist, it is most likely beyond the resources of any one vendor to provide it if they wished. So what are the options?
Based on 1990 SDR Article. Control systems act to make their own input match internal standards or reference signals. Competent control systems create illusions of stimulus response causality. Stimulus-response theory can approximate the relationship between disturbance and action, but it can't predict the consequences of behavior. These consequences are maintained despite disturbances. See also Double loop learning and Nurse Thinking Insights.
An example of why it's so critical to understand where the boundaries are when considering a system. (developed from Eric Wolstenholme's Archetype examples by Gene Bellinger)
Use a savings account model to investigate the manner in which inflows and outflows govern the quantity of a stock. Extend the structure to create and investigate the relationships of a growth producing reinforcing loop.
Often times there are a number of parameters in a model you want to set to specific values and run the model to demonstrate a particular behavior. When there are several variables involved remembering the setup is often difficult and takes time. And can you demonstrate the behavior when you're not there? Developing scenarios with Button scripts is a quick way to overcome these difficulties.
