What do activities of these images have in common?

The purpose of this model is to have the user change the value of stocks, flows and converters to experience a variety of different graphical results. Understanding this generic model is important pre-requisite to learning about intravenous drugs in the body, radioactivity, self-esteem, water flowing from a drain and many other basic natural systems.

This model is derived from the paper "Nobody Ever Gets Credit for Fixing Problems that Never Happened: Creating and Sustaining Process Improvement" by Nelson P. Repenning and John D Sterman. See Insight 752 for a causal loop version of this model.

While these pictures represent very different things there is a common essence.

While these pictures represent very different things there is a common essence.

All the following have a common characteristic.

The interaction of a population of Moose and Wolves.

Consider the following "Sustaining the Forest" model intended to provide another example of how unexpected the behavior of a web of extended interactions can be.

All the following have a common characteristic.

All the following have a common characteristic.

The interaction of a population of Moose and Wolves.

Joe P. is currently managing a project that's behind schedule and he's experiencing substantial pressure to get the project back on track.

The interaction of a population of Moose and Wolves.

The structure responsible for rabbit population growth.

The interaction of a population of Moose and Wolves.

Little Red Riding Hood walking through the woods to Grandma's house. How long will it take?

While these pictures represent very different things there is a common essence.

All you wanted to do was put a bird feeder in your yard to attract birds and make for a more pleasant morning. And...

There are limits to what one can infer from a qualitative model.

There are about fifteen known archetypes with an interesting set of relationships among them.

SystemsWiki's Musings

This Romeo and Juliet Model was adapted by Geoff McDonnell from Michael J Radzicki (1993) Dyadic processes, tempestuous relationships, and system dynamics, System Dynamic Rev. 9 (1) :79-94

All the following have a common characteristic.

Consider the following "Sustaining the Forest" model intended to provide another example of how unexpected the behavior of a web of extended interactions can be.

The interaction of a population of Moose and Wolves.