Ventity 2.0 Full Release
Following up on the Ventity 2.0 Beta, the full commercial release of Ventity 2.0 is now available.
Ventity Release 1.3
Ventity release 1.3 has arrived! Much of what’s new is under the hood, including big performance improvements and infrastructure to support deployment as a web service, with Forio support coming soon. There’s also a new architecture for lookup tables, with functions for extrapolation and finding the min, max, slope, and area under curves. The builtin […]
Work-Education Mismatch
Congratulations to Navid Ghaffarzadegana, Xue Yi and Richard Larson for their publication in EJOR, Work-education mismatch: An endogenous theory of professionalization.
Vensim 7 Release
Vensim 7 is available for download or purchase in the Vensim store. This includes several significant new features, including: – Interactive sensitivity runs in Synthesim – Percentile export for sensitivity runs– Calibration payoffs can now compare model variables to one another as well as to data (great for synthetic data experiments)– A trigger for data […]
Vensim 7 Synthesim + Sensitivity
In Vensim 7, we’ve combined real-time Synthesim with sensitivity analysis, so you can see the distribution of outcomes from Monte Carlo runs interactively. This is great for giving users an appreciation of the risk associated with a decision, rather than just a best guess.
Ventity Release 1.0.2
Ventity is just getting better – release 1.0.2 is now available for evaluation and purchase. Download a copy now. Entity Picker Improvements The revised Entity Picker is much faster than the initial version, which makes it easier to analyze large populations of entities. You can easily pick out individuals, or slice collections by attributes, to […]
Ventity Release 1.0.1
We’ve released a minor update to Ventity that resolves a “bootstrap” error on start up, experienced by a few users. If you already have release 1.0 running, there’s nothing to do – this is otherwise identical. If you’re just getting started, download Ventity with an evaluation license here. If you already have a license, get […]
Ventity 1.0 Released
Ventity is now officially available! Learn more about it. Download an evaluation copy. Purchase a license (or claim a free one). Release 1.0 includes enhanced Causal Tracing™, with interactive trees and strip graphs:
Modeling Discrete & Stochastic Events
It’s generally a good idea to begin thinking about your models with continuous time and quantities, particularly for strategic applications where you care about the big picture. But there are times when it matters that quantities are discrete – you can’t ride half a horse. Here’s a quick look at modeling such situations, starting with […]
December Sale
If you’ve been waiting to move to the premier dynamic modeling tool, or to extend your maintenance and upgrade to the latest version of Vensim, now is a great time. All Vensim editions are on sale, 20% off, through the end of December. Buy direct at the Vensim store. At the checkout stage, enter the […]
Jay Forrester, 1918-2016
We at Ventana Systems sadly mark the passing of Jay Forrester, pioneer in servomechanism control, digital computing, System Dynamics and global modeling. We hope that our tools and our work may carry on in Jay’s spirit, to help people better understand and manage complex systems, tackling the biggest problems with courage and integrity.
New C-ROADS and World Climate simulators
The latest version of Climate Interactive‘s award-winning C-ROADS climate change policy simulator, powered by Vensim, is available athttps://www.climateinteractive.org/tools/c-roads/ You can run the simpler World Climate version online, in a nice browser interface:
Ventity Beta E48, October 6, 2016
The latest beta is #E48, October 6th. Get it here. There are several improvements over the September release, but one that’s particularly helpful is color-coordination of entity traces across multiple charts: We’re preparing for commercial release, so this version is testing licensing infrastructure. For the moment, this could hardly be easier – just click the […]
Ventity Beta update E30, September 27, 2016
The latest beta is #E30, September 27th. Get it here. There are many refinements in this version, and stability is very good. There are too many items to list, but here are a few representative improvements: Causal tracing tables simplify debugging Copy-paste stability much improved Multi-sliders for Synthesim-like control Optimization with vector inputs and outputs […]
Ventity Introduction with Infection Models
We were very pleased with our Ventity workshop at the SD conference in Delft. We had a good crowd, with interesting questions and lots of potential applications that will benefit from our new approach. This series of videos walks you through most of the workshop content. The workshop models are in InfectionSeries.zip, and you can […]
Collaboration
This video takes a look at opportunities for team model building in Ventity. Ventity has a modular structure, with each entity and dataset in a separate XML file. That makes it practical to use source control systems (like subversion or git) or sync software (like Dropbox or OneDrive) to manage file sharing and versioning. Once […]
Energy Policy Simulator
Energy Innovation has a cool new simulator that lets users explore what it takes to achieve energy and emissions targets, in detail. The simulator is online with a custom HTML5 interface that runs a Vensim model on servers using the Multicontext shared library. The interface was developed by Todd Fincannon. It has extensive documentation, and […]
Vensim Causal Loop Diagramming
This video shows several ways to build causal loop diagrams in Vensim. We start simple with Vensim PLE, and then illustrate some additional features, like navigation links, that are possible in DSS. The first ten minutes should have you up & running on the basics.
ISDC 2016 Best Poster 2016
Congratulations to Joona Tuovinen for receiving the Best Poster award at ISDC 2016, for The Dynamics of Product Commonality: implications of the circular causality between product and firm structures. The conference proceedings include the paper and Vensim model in the Supporting Material.
Model Analysis – World Dynamics
This video walks through a critique of the World model that kicked off the Limits to Growth debate, starting with Forrester’s World Dynamics, followed by World3 and the Limits to Growth and many subsequent works. The purpose of this video is not to discuss the mapping of the world models to the real world, though […]
2015 Dana Meadows Award
The 2015 Dana Meadows Award goes to Mohammad Jalali, Armin Ashouri Rad, Oscar Herrera-Restrepo and Hui Zhang for Information Diffusion through Social Networks: the Case of an Online Petition. People regularly use online social networks due to their convenience, efficiency, and significant broadcasting power for sharing information. However, the diffusion of information in online social networks […]