A Tragedy of the Commons situation exists whenever two or more activities, each, which in order to produce results, rely on a shared limited resource. Results for these activities continue to develop as long as their use of the limited resource doesn't exceed the resource limit. Once this limit is reached the results produced by each activity are limited to the level at which the resource is replenished. See also Archetypes.

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

This is a conceptual presentation for what Chapter 5 might become as archetypes evolution.

All the following have a common characteristic.

A Tragedy of the Commons situation exists whenever two or more activities, each, which in order to produce results, rely on a shared limited resource. Results for these activities continue to develop as long as their use of the limited resource doesn't exceed the resource limit. Once this limit is reached the results produced by each activity are limited to the level at which the resource is replenished. See also Archetypes.

The limits to growth structure is based on the basic growth structure. And, as should be obvious, nothing grows forever as growth requires resources. Those required resources become a limits to growth. See also Archetypes.

What do activities of these images have in common?

Once the strategy has been developed it's up to the Stakeholders who own the segments of the revised model to implement it so a new pattern of behavior is created thus effecting the desired situation.

We often set out to solve a problem or accomplish some particular result and things seem to go as planned. As time progresses it seems that progress becomes more and more difficult, if not impossible, and things may actually become worse than when we started. When this happens it is typically a Fixes that Fail structure that's operating. See also Archetypes.

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Investigations into the relationships responsible for the success and failure of nations. This investigation was prompted after reading numerous references on the subject and perceiving that *Why Nations Fail: The Origins of Power, Prosperity, and Poverty* by Acemoglu and Robinson seem to make a great deal of sense.

A spatially aware, agent based model of disease spread. There are three classes of people: susceptible (healthy), infected (sick and infectious), and recovered (healthy and temporarily immune).

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Causal Loop Diagram is an element of the Simulation with Insight Maker program.

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A spatially aware, agent based model of disease spread. There are three classes of people: susceptible (healthy), infected (sick and infectious), and recovered (healthy and temporarily immune).

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This is a clone of My First Map being used to demonstrate the addition of images to make a map more visually appealing.

My first relationship map which demonstrates the build out of the relationship options for a project which is behind schedule.

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.

• 10.06.04 v1.0 created and documented by Bellinger. Initial problem with the reference mode has been fixed.

The boundary defines the extent of the system.

If you mouse over an item and an "i" is displayed there is a note attached. These are on some nodes and some links.

A simple Susceptible - Infected - Recovered disease as a stock and flow model.

Cloud example. If you really want clouds a sources in your model it's pretty easy to create one.

The limits to growth structure is based on the basic growth structure. And, as should be obvious, nothing grows forever as growth requires resources. Those required resources become a limits to growth.

The Exponential Growth Archetype is a reinforcing structure which promotes exponential growth. This is one of the two foundation archetypes. The other being the goal seeking structure. See also Archetypes.

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

Demo of changing vector length on the fly.