Quantitatives Demo Modell MC by Kai Neumann

Kleines Demo-Modell aus dem Tutorial (dort auf Englisch, via Menu ... Zeige Hilfe und dann Klick auf den Fragezeichen-Button am unteren Fenster-Rand) und dem gerade aktualisierten Buch: Qualitative und Quantitative Ursache-Wirkungsmodellierung

SDS Seminar 24 - Qualitative Modeling of the example of desalination in Portugal by Kai Neumann

just the beginning of a model for a seminar for the System Dynamics Society: https://www.linkedin.com/feed/update/urn:li:activity:7162906265629765632/ Objective As a consequence of climate change many reasons face a growing lack of drinking water as well as water for agriculture. One option seem to be desalination plants but they are heavily disputed. The objective of the model is to find levers to secure the availability of drinking water. Participants ... Time short - this summer medium - next three ye...

ECEM Workshop Model 2023 by Kai Neumann

The target .... The model should.... Participants Short ... Medium ... Long ... Categories/Colors (see Menu.... Filter) System boundaries

The world economy - modeling an article from the SPIEGEL by Kai Neumann

Here is a small model of the arguments taken from an online article from the SPIEGEL: http://www.spiegel.de/wirtschaft/wachstum-der-weltwirtschaft-der-kapitalismus-ist-kaputt-a-1028098.h...

Matching data example - calibrating a model by Kai Neumann

While listening to a presentation on the ISDC2023 where they showed a sophisticated way of calibrating parameters of a model to real data I decided to offer a simple solution using the iMODELER's iM-Optimizer. The idea is to minimize the deviation of the model results from the real data using a range() for all variable parameters. Simple as that though of course it also has some limitations.

Example model on Value Chains (Quantitative Process Model) by Kai Neumann

Just a small example model to show the benefits of quantitative modeling of value chains (https://en.m.wikipedia.org/wiki/Value_chain) The model shows just the basic use of process and project factors as well as resource factors and parameter for their prices. The major benefit of the iMODELER is now to continue with non-linear dynamics in case of reinforcing errors or variations analysed with Monte Carlo simulations to match reality‘s complexity. Don‘t hesitate to ask for more specific and advanced exam...

PiM: Demo model for modeling supply chains and optimal inventories 2 by Kai Neumann

This is a small example model that shows how to use normal factors and delays to model delivery times (so you do not always have to use PiM factors); how to identify the optimal quantity of orders and how to identify the optimal number of resources. Do not hesitate to ask for more explanations or some variations of the model :-)

Quantitative model on smallholder's income (Workshop example using Monte Carlo) by Kai Neumann

This quantitative model is from a workshop for the University of Cape Coast. It features a small quantitative model that starts with a steady constant development of a smallholder's income from growing one crop. Via step by step simulation it can be changed. The model, then, was enriched by a Monte-Carlo simulation of the possible influence from extreme weather and by the use of the range() function to look for all possible combinations to identify an optimal solution. Note: some of the factors have an e...

Feed the world - qualitative model on the arguments by Kai Neumann

I was recently preparing my contribution to the  System Dynamics Conference presenting our comprehensive quantitative GLU Model (global land use). At the same time I am repeatedly  confronted with the argument that in order to save the world we need industrialized farming with the use of pesticides, fertilizer, and high precision farming, because otherwise we would not have enough yields to feed the world and thus would need more deforestation. Well, while the quantitative model shows that without major ...

Oil System Model by pierreweidemann@w*

The "Oil System Model" tries to show the significant influences on the price of oil and their implications. Originally created by Gene Bellinger Feel free to join in on the modeling by clicking the collaborative link. Source  - -http://www.systemswiki.org/index.php?title=Oil_System_Model