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

There are about a dozen known systems archetypes with an interesting set of relationships among them. Watch Video

The interaction of a population of Moose and Wolves.

The interaction of a population of Moose and Wolves.

This is a model depicting the interactions of the Aesop's Fable "The Boy Who Cried Wolf."

Insight Maker is completely web based making it easy to develop and share models, allows concurrent multi-user editing, and just happens to be FREE, which a pretty good feature/price ratio.

The interaction of a population of Moose and Wolves.

A Limits to Growth Systems Archetype consists of a Reinforcing Loop, the growth of which, after some success, is offset by the action of a Balancing Loop.

Introduce the concept of modeling and simulation.

The interaction of a population of Moose and Wolves.

The generic stock & flow form for a balancing loop.

New Learning tend to reduce Outdated Thinking, Communicating & Learning though our Outdated Thinking, Communicating & Learning inhibits new learning. The question is then how do we break this cycle. Adopted from "An Introduction to Systems Thinking with STELLA" by Barry Richmond.

The interaction of a population of Moose and Wolves.

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. As an example, consider multiple departments with an organization using IT resources, until they've exhausted IT capacity.

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

The causal loop form for a balancing loop.

Fixes that Fail Systems Archetype Stock & Flow Diagram.

Diagram from a paper by James B. Rieley entitled "The Euro Financial Crisis: Making Sense of the Mess".

A Limits to Growth Systems Archetype consists of a Reinforcing Loop, the growth of which, after some success, is offset by the action of a Balancing Loop.

The interaction of a population of Moose and Wolves.

Developing a strategy for dealing with a situation begins with a description of the situation and the preferred state for today, not in some distant future, and the perceived implications of not doing anything. There is a also a video for this insight.

A Growth and Underinvestment with a Drifting Standard structure is simply an elaborated Growth and Underinvestment structure where the growth inhibitor induces a decline of the standard over time. The real nasty thing about this structure is that the growth inhibitor influence sets up a Reinforcing Loop which even further promotes a drifting of the standard over time.

As long as A and B are equally successful everything will remain stable. Though if either A or B receive more resources than the other, or A or B is more successful than the other, the imbalance will result in greater success of A or B accordingly and promote even more success of the one that demonstrates greater success.