Contents Ventity 5.2 Release Ventity 5.2 has just been released. You can download a copy with a 60-day evaluation license, or update your existing copy. 5.2 is primarily a performance upgrade, with parallel execution of sensitivity runs and improved savelists for managing sensitivity output. There are also some nice usability improvements, like duplication of Actions, […]
– Vensim™ 10.2 is now available (featuring Sensitivity2All and multi-core sensitivity/optimization). – System Dynamics Conference – Online courses – Resources for Vensim users – Distributors ——————————————————————————————————————————————— – Vensim 10.2 Released ———————————————————————————————————————————————Vensim 10.2 is now available for download: – New loops tool. We’ve redesigned the loops tool. You can now highlight structure on a sketch. – […]
1. Vensim 9 2. Vensim 9 launch sale, throughout the month of August 2021 3. Ventity 4.6 4. System Dynamics Society Seminar Series, Introduction to Modeling Process – Nici Zimmermann, August 18th 2021 5. Online courses 6. Applications 7. In the Forum 8. System Dynamics Conference News 9. Resources for Vensim users 10. Our official […]
1. Vensim 8 2. Vensim 8 launch sale, throughout the month of September 2019 3. Ventity 3 4. Online courses. 5. Applications 6. In the Forum. 7. System Dynamics Conference News. 8. Resources for Vensim users. 9. Our official distributors ————————————————————————————————— 1. Vensim 8 Release ————————————————————————————————— Vensim 8 has been released. It’s is now fully […]
Congratulations to Navid Ghaffarzadegana, Xue Yi and Richard Larson for their publication in EJOR, Work-education mismatch: An endogenous theory of professionalization.
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 […]
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.
Vensim can be used to put big data in context, by incorporating the learnings from big data in simulations that account for organizational structure and finances. Vensim can also do data intensive simulation, with flexible I/O, advanced algorithms for calibration, optimal filtering, confidence bounds and Monte Carlo simulation.
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 […]
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 […]
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.
The latest version of Climate Interactive‘s award-winning C-ROADS climate change policy simulator, powered by Vensim, is available at https://www.climateinteractive.org/tools/c-roads/ You can run the simpler World Climate version online, in a nice browser interface:
The Millennium Institute (MI) is pleased to announce the release of Version 1.2 of the Integrated Sustainable Development Goals planning model (iSDG). The iSDG is a comprehensive simulation tool developed with Vensim that generates country-specific development scenarios to show the implications of policy interventions on a country’s progress towards the SDGs. What’s New in Version […]
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 […]
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.
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.
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 […]
Get It Vensim 6.4 is available for download or purchase in the Vensim Store . Upgrades are easy – just visit the download page and enter your license key information. If your maintenance is current, you can download immediately. If you don’t have a current license, you can extend your maintenance easily – just follow […]
The public beta of Ventity, new simulation software, is now available – we’ve just uploaded the latest (build 573). Get it at https://www.ventity.biz Ventity is new simulation software for complex systems. Key benefits include: Modularity and object orientation, supporting sectors and complex agents, without arcane arrays Dynamic creation and deletion of model components and relationships […]
SDM-Doc is a nice open source tool for documenting system dynamics models. The latest version runs in Java and provides new functionality. See the Workbench for a link: SDM-Doc/Java The Java version provides a superset of the .NET capabilities (expect for the display of stock and flow diagrams). Among the additional capabilities are: Feedback Loop […]
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 […]
Get It Vensim 6.3D is available for download or purchase in the Vensim Store . Upgrades are easy – just visit the download page and enter your license key information. If your maintenance is current, you can download immediately. If you don’t have a current license, you can extend your maintenance easily – just follow […]
Vensim 6.3 is available for download or purchase in the Vensim Store. 6.3 emphasizes engine improvements that keep Vensim #1 when it comes to industrial strength simulation. There are also some usability upgrades, like better number formatting and placement of the workbench variable in the bottom status toolbar.
Fall Sale – 20% off Vensim, through the end of November 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 November 2013. […]
We’re pleased to share our presentation from the Vensim User’s Group meeting at the 2013 International System Dynamics Conference in Cambridge. The highlight of most immediate interest is the imminent release of Vensim 6.4, which runs in 64 bit mode, permitting models to address much more memory. An alpha version is already running on our computers.
Congratulations to the C-ROADS team for winning the System Dynamics Society’s Applications Prize! Left to right: John Sterman (MIT Sloan), Phil Sawin, Drew Jones, Lori Siegel (CI), Tom Fiddaman (Ventana), Travis Franck (CI), Erich Zahn & Jack Homer (for the Society). Not shown: Beth Sawin (CI) and numerous other collaborators and partners who made the […]
Release Version 6.0a includes fixes for several minor problems introduced with new features in Version 6.0. These include: Equation Editor Icons Optimization Excel import See the full release notes.
See: http://simulation.tbm.tudelft.nl/ema-workbench/contents.html “Exploratory Modeling and Analysis (EMA) is a research methodology that uses computational experiments to analyze complex and uncertain systems (Bankes, 1993).That is, exploratory modeling aims at offering computational decision support for decision making under deep uncertainty and Robust decision making. The EMA workbench is aimed at providing support for doing EMA on models […]
Bob Walker discovered yet another use for Vensim – naming his boat. He created the graphic with the name and feedback loop and then had the sign company transfer that to the back of his new boat. The result floats above the rest.
In order to track the ability of a team to do its work it is necessary to know both how much skill the team has built up as a team and what the experience levels of the individual team members are. By creating a matrix of team membership that includes both time with the team […]
For analytic work in support of capital investment decisions the ultimate measure of success is not always clear. Plants and distribution systems that perform as expected in terms of throughput and uptime do validate the results of technical components of the simulation. Making such comparisons in detail is, however, costly and time consuming. In addition, […]
C-ROADS and C-LEARN are interactive, accessible computer simulations that help people visualize the long-term climate impacts of decisions being undertaken today. By making it easy to add up country emissions targets and to project their implications for the “bathtub dynamics” of the atmosphere, they bring accountability to the global negotiation process. C-ROADS has a number […]
Version 6.0 introduces a new look and new features, along with many bug fixes. Interface Changes Equation Editor Toolbars and Cursors Optimization Features Stochastic optimization Discrete constraints on optimization parameters Extended payoffs Markov chain Monte Carlo & simulated annealing Extended payoff report information See the full release notes and video introduction.
Vensim 5.11a Significant upgrades to the Help system, including improved indexing and nearly 100 sample models illustrating the use of built-in functions. Enhancements to the document tool and SyntheSim functionality with lookups in large models A number of bug fixes that improve robustness and functionality
Vensim 5.10 integer allocation with ALLOCATE_AVAILABLE import data from .xlsx files and also access them using GET DIRECT… function or GET XLS… functions on the Macintosh. Double precision data support is also available for DSS only. GET XLS with named ranges on the Macintosh Mac compiled simulation support and external functions and a double precision […]
