Image from "All models are wrong: reflections on becoming a systems scientist" by John Sterman.

This is a segment of Simulation with Insight Maker.

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There exists a well defined set of possible ways to alter an existing set of interactions. Each of these alterations will produce a particular effect depending on the relations the change is relative to. Identifying which are possible and which will migrate the interactions to produce the desired situation is the essence of the strategy.

How to get this thing to pause based on observation.

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.

Implications of a variation between deadline and expected project completion date.

Inventory Model v3.0 adds target inventory adjustment to maintain desired service level. See also: Inventory Model v2.0.

Time Settings are used to define the simulation start time, duration, and the step size used from one calculation to another.

Escape behavior often results in more stress than one escapes from.

Simple bathtub model to show the difference between Stock and Flow. Run the model with various values for filling and draining to see the implications.

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Examples of reinforcing and balancing loops enhanced with images to maybe them more visually engaging.

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

Bathtub model with max fill rate control added to account for the maximum rate water can enter via the faucet.

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What do activities of these images have in common?

Simple savings account.

The delays associated with adjusting the shower is a very common example of the Balancing Loop with Delay Systems Archetype. 

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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Example of using Pulse function to create a recurring delay.

Model is created by Gene Bellinger. Original model can be accessed from https://insightmaker.com/insight/2249/Adjusting-the-Shower-SFD.

While Knowledge-Centered Support is rather easy to understand and has amazing potential realizing that potential seems to be quite elusive.

The goal seeking structure endeavors to bring a balance between a current state and a desired state. This is one of the two foundation archetypes. The other being the growth structure. See also Archetypes.

A Growth and Underinvestment structure is simply an elaborated Limits to Growth structure where the growth inhibitor is part of another Balancing Loop with an external standard and some delay. The real nasty thing about this structure is that the two Balancing Loops form a single Reinforcing Loop which inhibits growth.

Video

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Part 1 demonstrates Picture primitives and Links to create representations of interactions. These are made visually attractive because the Picture primitives are overlay'd with images.

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The Model being used as part of the Collaborative Model Development project at Systems Thinking World.

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