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

Balancing Loop with Stock & Flow Diagram.

Introduce the concept of modeling and simulation.

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

When one undertakes to create a model there are a number of guidelines that are considered essential for consideration if there is to be a success with the model.

Balancing Loop with Stock & Flow Diagram.

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

Esta é uma tradução da fábula de Aesop conhecida como  "The Boy Who Cried Wolf."

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

The Home Heating System can be used to demonstrate how we get caught in dilemmas and become victims of ourselves.

Balancing Loop with Stock & Flow Diagram.

A small change in one variable can have a marked impact on multiple variables. Run the model [quits change] = 0  and consider the output. What happens if  you change [quits change] = 5. Run the model to find out. Was the change what you expected?

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

All the following have a common characteristic.

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

What do activities of these images have in common?

This common archetype of systems that include relapse or recidivism allows exploration of the unintended effects of increasing upstream capacity and swamping downstream capacity. The increase in the relapse rate eventually returns to swamp upstream capacity as well. A social welfare example, based on a TANF case study, from How Small System Dynamics Models Can Help the Policy Process. N. Ghaffarzadegan, J. Lyneis, GP Richardson. System Dynamics Review 27,1 (2011) 22-44 Conference version at http://bit.ly/HlxtZj

What do activities of these images have in common?

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 1899 for a simulation of this model.

The model construction process is actually a balancing loop with endeavors to employ an abstract version of real events to form a model which produces conclusions and behavior which mimic the real events.

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.

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

The model construction process is actually a balancing loop which endeavors to employ an abstract version of real events to form a model which produces conclusions and behavior which mimic the real events.

What do activities of these images have in common?