Tutorial: Quantitative Demo Model (diffusion model, word of mouth WoM marketing) by Kai Neumann

This is the quantitative model from the tutorial (Menu ... Show Help ... "?" ... Quantitative Model)

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...

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 :-)

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...

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...

ECEM Workshop Model 2023 by Kai Neumann

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

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

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...

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.

Interpretation of loops: a dispute between qualitative and quantitative modelers by Kai Neumann

Small model to show the limits and strengths of qualitative models when we look at loops.