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.

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

The structure responsible for rabbit population growth.

Rich Pictures, Causal Loop Diagrams and Stock & Flow Simulation Models are the three types of models most commonly used.

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.

There's actually more to filling a swimming pool with water than you might realize.

All you wanted to do was put a bird feeder in your yard to attract birds.

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?

What do activities of these images have in common?

Balancing Loop with Stock & Flow Diagram.

Balancing Loop with Stock & Flow Diagram.

What do activities of these images have in common?

All the following have a common characteristic.

Introduce the concept of modeling and simulation.

What do activities of these images have in common?

Balancing Loop with Stock & Flow Diagram.

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

Balancing Loop with Stock & Flow Diagram.

The structure responsible for rabbit population growth.

What do activities of these images have in common?

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...

All the following have a common characteristic.

Balancing Loop with Stock & Flow Diagram.