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

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

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

An implementation of the classic Game of Life using agent based modeling.

Rules:

• A live cell with less than two alive neighbors dies.
• A live cell with more than three alive neighbors dies.
• A dead cell with three neighbors becomes alive.

What do activities of these images have in common?

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.

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

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

@LinkedIn, Twitter, YouTube

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

What do activities of these images have in common?

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.

@LinkedIn, Twitter, YouTube

There are numerous influences which work against the possibility of sustainable capitalism though there are a few that might be put in place to actually support its emergence.

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).

@LinkedIn, Twitter, YouTube

When we address situations we tend to do so with myopic limited awareness of the real nature of the situation and our actions tend to produce unintended consequences which make the situation worse or create other problems that have to be dealt with by us or others.

This is my first attempt at creating a simple Agent Based Simulation Model. Nothing fancy, just something that works.

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).

@LinkedIn, Twitter, YouTube

Hypertension Generic Patient Flow CLD.

All the following have a common characteristic.

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.

Population Growth in an Agrarian Society with the addition of agriculture.

Macros are very useful for defining functions that need to be repeatedly at various places in the model.

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

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

An example using custom units to convert a flow from one units to another.