2020 Virtual Workshop Listings (Tentative)

International Conference of the System Dynamics Society
July 23-24, 2020

One of the highlights of the Society’s Conference is workshops offered by practitioners of System Dynamics.  This year, all workshops will be held virtually on Thursday and Friday and will be for 90 minutes, unless otherwise noted. Whether you are a beginner, intermediate or advanced you will find an opportunity to build your skill from this list of 25 workshops.  Check the emerging conference schedule for more information.


Full Workshop Descriptions

Building System Dynamics Models From the News
by Diana Fisher

Abstract: This workshop is for instructors who want to learn to build (or help their students learn to build) original System Dynamics (SD) models for a dynamic feedback topic they have read in the news.  One potential sequence of steps I have used with my students to help them learn to select an appropriate article and build a working SD model for a dynamic, feedback topic that is interesting to them will be demonstrated.  A news article will be provided and we will progress through the steps as if we were our students.  The importance of knowing how to construct a dimensionless multiplier will be discussed. Original student models will be displayed. 

Requirements Level:  Beginner
Participants should bring:  paper and pencil

Teaching Students to Create Original Models in a Ten-Week Course
by Diana Fisher

Abstract: This workshop is for instructors who want to incorporate a System Dynamics (SD) model building component into their curriculum, for their students, but do not have the luxury of spending an entire academic year or even an entire academic semester trying to build up the skills students need to in order to build a relatively small original model that has somewhat interesting dynamics.  This workshop will provide a sequence of topics that have worked well for a ten-week environmental science modeling course scheduled in a computer lab twice a week, for 110 minutes each time.  Students enter the course with no background in System Dynamics modeling.  The course is an undergraduate junior level (3rd year) course for students from any discipline.  Students (in pairs) are expected to select a dynamic problem to study in the 5th week of the term, build a working model, write a relatively short technical paper, and present the model to the class by the end of the ten-week term.  The approach could be used as a course on SD model building in a particular discipline or as part of a course for which SD model building is designated as a significant component.

Requirements:  Level:  Intermediate
Participants should bring:  Laptop 

 Starting from Scratch: Better Model Construction
by Leonard Malczynski

Abstract: This workshop will be an introduction to model construction. This is not formulation, group model building, or testing. This is all about the process of using system dynamics software tools to create well built and robust simulations. We will examine the quality of model construction, personal processes that will improve modeling skill, and criteria for checking the 'well built' attribute of system dynamics models. The workshop is intended for people who are relatively new to the field, have encountered models that can't be understood, or do not have considerable modeling experience. Sample models will be available.

Requirements:  Level:  Everyone
Participants should bring:  A best practices document can be downloaded at http://www.powersim.com/main/services/simulation_services/user_communities/white-papers/.
Advance Preparation:  Get the Powersim Studio Best Practice manual.


Building Interactive System Maps with Kumu
by Jeff Mohr 

AbstractIn this workshop, participants will get hands on exposure to Kumu - an online platform for building and sharing systems maps, stakeholder maps, and social network maps. This workshop will focus primarily on how to use Kumu to build interactive system maps starting from the first steps of building a loop all the way to creating compelling presentations of a completed systems map. Examples of relevant projects will be shared. For more information see https://kumu.io/tour.

Requirements:  Level:  Everyone
Participants should bring:  Laptop or other computer


Feedback Rich Model Construction with Powersim Studio
by Leonard Malczynski

Abstract: This workshop will be an introduction to building system dynamics models using Powersim Studio. The workshop is intended for people who are relatively new to the field or do not have experience using Studio. The session will be conducted as a hands-on workshop and will demonstrate basic techniques for building and analyzing, stock and flow diagrams and simple simulation models. It will also point out some of the advanced Studio features such as arrays, user interface tools, VB scripting, and the powerful Studio interactive development environment (IDE). Sample models will be available.

Requirements:  Level:  Everyone
Participants should bring:  A free version of Studio with no expiration can be obtained at: http://www.powersim.com/main/products-services/download/express/ In addition a free 30 day license with complete functionality can be found at http://www.powersim.com/main/products-services/download/demo/. Remember DO NOT INSTALL this 30 day version more than 30 days before the workshop!

Model Analysis with Vensim
by Thomas Fiddaman

Abstract: In this hands-on workshop, we will explore ways of testing models and the conclusions that flow from them, using Vensim. This process is crucial to the development of understanding and avoidance of errors. Topics covered will include dimensional consistency and conservation laws, feedback elimination, extreme conditions tests, parameter sensitivity, and other formal and informal methods for getting the most out of a model. The class will center around a variation of Dennis Meadows' commodity model. Participants will reconstruct portions of the model in order to understand key structures like an ordering decision. We will create a simple control panel for the model. Then we will use those tools to work through a critique of the model, making on-the-fly changes to the structure and parameters, and exploring the implications of decision rules. Participants will walk away with a basic understanding of the process of building a model with Vensim, using it to gain policy insight, and assessing model quality.

Requirements Level:  Everyone
Participants should bring:  Bring a laptop or share with a friend. We aspire to provide power, but a full battery is a good idea. Vensim PLE can be installed in advance from the web link provided. A Vensim DSS trial copy will be available in the session. Please install software ahead.
Advance Preparation:  Familiarity with the most basic system dynamics concepts is assumed, along with the ability to make simple equation edits to and run a Vensim model. See http://vensim.com/building-a-simple-vensim-model/

Getting Started with Ventity
by Thomas Fiddaman

Abstract: This is a hands-on introduction to Ventity, a platform for system dynamics modeling that supports detailed and object oriented modeling while preserving attractive features of existing tools, including a completely declarative language with a graphical representation. We will introduce the software and new concepts, including collections of entities, attributes, relationships, aggregation and allocation functions, and actions. Features facilitate modularity and collaboration, provide a more natural description of detail than arrays, and solve sparse matrix problems. It has application to both traditional system dynamics, with modular sectors, and to agent based modeling.

Requirements:  Level:  Everyone
Participants should bring:  Bring a laptop or share with a friend. Ventity requires Windows 7, 8 or 10 -- either Windows hardware or a Mac emulator. We aspire to provide power, but a full battery is a good idea. Materials and a Ventity trial copy will be available in the session; arrive early to install software if you don't already have a recent copy; we strongly recommend installing in advance from the link provided.
Advance Preparation:  Familiarity with basic system dynamics concepts is assumed, but no preparation is necessary.

Getting Started with Stella
by Karim Chichakly, Robert Eberlein, William Schoenberg, Sarah Davie

Abstract: In this workshop we will guide participants through the construction of models using Stella Professional. The workshop has no prerequisites. It is designed for people who are new to Stella or wish to renew their relationship with Stella in its modern form. We will work through the basic mechanics of setting up and using the software and then together build and analyze a simple model. Participants will learn the mechanics of using the software including constructing a diagram and connecting everything together to create a simulating model. We will explore the use of custom table and graphs as well as the built in analytics for understanding models and the use of Stella Live to gain insights into model behavior. Participants should bring their own computers, either Macintosh or Windows, and we will install the software for use during the workshop.

Requirements:  Level:  Everyone
Participants should bring:  An internet connected laptop.  Windows, MacOS, or Chromebook.

Automated Loop Dominance Analysis in Stella using Loops That Matter
by William Schoenberg, Robert Eberlein, Karim Chichakly, Sarah Davie

Abstract: New in Stella Architect and Stella Professional is the ‘Loops that Matter’ toolset which automates the process of formal loop dominance analysis. In this workshop we will show you how to do your own loop dominance analyses using a variety of models from the very simple (<5 feedback loops) to the very complex (>500 feedback loops).  During this workshop participants will learn: 1. How to interpret and use animated stock and flow diagrams to understand the origins of model behavior. 2. How to machine generate accurate animated causal loop diagrams of the real time loop dominance profile of their models. 3. How to quickly simplify complex models without losing the dynamics which are key to model understanding.  Participants should bring their own computers, either MacOS or Windows, and we will install the software and models for use during the workshop.  No prior experience with Stella is necessary.

Requirements:  Level:  Everyone
Participants should bring:  A laptop (not necessarily internet connected) with either Windows or MacOS.

 Optimization and Calibration with Stella
by Robert Eberlein, Karim Chichakly, William Schoenberg, Sarah Davie

Abstract: This workshop will cover the mechanics of, and ideas behind, optimization and calibration of System Dynamics models using Stella. Using models distributed as part of the workshop set up, participants will learn how to perform optimizations to maximize outcome objectives in a model. Then, using data and models also provided as part of the setup how to perform the calibration of a model against data. Time permitting, there will be some discussion of combining optimization with sensitivity analysis, using random restarts to test the global characteristics of an optimization or calibration parameter set, and computing confidence bounds on calibration parameters. The discussion will be largely practical, and does not require any background in statistics. Participants should have a good grasp of the mechanics of using Stella, or have attended the introductory workshop. There are no reading or advanced preparation requirements. Participants should bring their own computers, either Macintosh or Windows, and we will install the software for use during the workshop.

Requirements:  Level:  Everyone
Participants should bring:  Best if people know Stella or have attended the intro session.

Building and Sharing Online Simulations Using Stella
by William Schoenberg, Robert Eberlein, Karim Chichakly, Sarah Davie

Abstract: Stella enables the creation and web-based deployment of model interfaces. This workshop will take participants through that process demonstrating both the mechanics of the software use and the principles behind effective interface development. There are no prerequisites for this workshop, but those who have not used Stella Professional may find it helpful to combine this session with the Getting Started session. Conceptually, the interface development process is significantly different from the model development process with the emphasis on packaging rather than developing model based insights. Mechanically, however, there is substantial overlap with many of the same components, such as graphs and tables, shared between both model and interface development. During the workshop participants will develop an interface for an existing model including an animated data visualization. Participants should bring their own computers, either Macintosh or Windows, and we will install the software for use during the workshop.

Requirements:  Level:  Everyone
Participants should bring:  A laptop with either MacOS or Windows

Publish Your Interactive Simulations Online with Forio Epicenter
Facilitated by Michael Bean

Abstract: This is an introduction to Forio Epicenter workshop where we show participants how to put their system dynamics model online.
Requirements:  Level:  Everyone

Techniques for Creating a Popular Online Simulation
by Michael Bean

Abstract: This is a workshop talk that shares simulation examples and shows what made them successful. We're trying to summarize key features that help make online simulations successful.

Requirements:  Level:  Everyone
Participants should bring: Laptop or tablet
Advance Preparation:  Participants will be provided with a list of further reading in the workshop and can be advised on specific literature relevant for their project during the workshop.

Move Your In-person Simulation Workshop to Online Delivery
by Michael Bean

Abstract: Many simulation deliveries have moved online. Effective simulation events can take place even when in-person gatherings cannot. Remote simulation workshops using technology-enabled tools can help keep delivery plans on-track, even when in-person interaction is impossible. During this workshop, we’ll show you how you can migrate your in-person simulation to online delivery with a combination of simulation and web share technologies, including:  1. Host online asynchronous simulation events that include competitions using single-player simulations   2. Run remotely-played multiplayer simulations supplemented with web share debriefs   3. Provide synchronous anonymous multiplayer simulations without the need to set up groups in advance. 

During the online workshop, we'll run example simulations together and provide guidance on using simulations online.

Requirements:  Level:  Everyone
Participants should bring:  Laptop or tablet

SDM-Doc: The System Dynamics Model Documentation and Assessment Tool
by Ignacio Martinez-Moyano

Abstract: In order to enhance model transparency through enhanced documentation and assessment, scientists at Argonne National Laboratory (ANL) developed “SDM-Doc”, the System Dynamics Model Documentation and Assessment Tool that enables modelers to create practical, efficient, HTML-based model documentation and that provides customizable model assessments. The model documentation created by the SDM-Doc tool allows modelers to navigate through model equations and model views in an efficient and practical way creating documentation of the model sorted by variable name, type of variable, group, view, module, module/group/name, and variable of interest. Additionally, model tests are performed allowing modelers and reviewers of models to gain confidence in fundamental characteristics of model structure. The latest version of the documentation and assessment tool, its use, and the different assessments included in the tool will be presented and explained. Participants are encouraged to bring their laptops to be able to use the tool during the workshop. A copy of the software will be distributed to participants at the workshop (the tool is accessible at https://www.systemdynamics.org/SDM-doc).

Requirements:  Level:  Everyone
Participants should bring:  Laptop is recommended
Advance Preparation:  https://onlinelibrary.wiley.com/doi/10.1002/sdr.1471

Adapting Group Model Building Scripts for Use in Diverse Community Contexts
by Ellis Ballard, Allison Simpson, Kelsey Werner, Jill Kuhlberg, William Liem, Sarah Pritchard

Abstract: This workshop presents a set of principles, practical guidance, and case examples on the adaptation of group model building scripts for use in cross-cultural, multi-language, and diverse settings within communities.  The workshop will feature a discussion of the origins and evolution of scripted group model building, and areas where we need more resources to support modelers and other practitioners working in community. We will present a framework to guide design decisions in a GMB workshop, present examples of GMB script adaptations used in various diverse contexts, and identify tips, tricks, and common pitfalls.   The workshop will close with an interactive activity in which workshop participants create new adaptations or share how they are currently adapting scripts for their own unique modeling contexts in order to promote collaboration and resource sharing.

Requirements:  Level:  Everyone

Getting Started with SD - The Agile Path
by Kim Warren, Christina Spencer, Christopher Spencer

Abstract: Participants on this workshop will follow a practical and reliable process to actually build a real-life case.  Because the method shares basic features with the agile approach now widely used for software development, we call this process "agile-SD". You build models closely with the users who want them (just as is recommended for any SD modelling), but rather than start by building an all-encompassing view of the whole problem-space, you start from the factor(s) that most closely represent the user's challenge and work outwards.  At each step, you combine 'abductive reasoning' ("what factors cause this outcome") with quantified confirmation. This approach means that you always have a working model, checked with the user and real or estimated data. The method contrasts with approaches that attempt first to map out the whole system structure, by asking stakeholders how they think it works, then seeking data and trying to get the model to behave correctly - a daunting challenge for beginners and experienced modelers alike!

Requirements:  Level:  Everyone
Participants should bring:  No prerequisites, but participants will need to be working online during the webinar - preferably with a friend.

Mapping stakeholder’s Mental Models of Complex Systems with M-Tool
by Karlijn van den Broek, Sina Klein, Usman Isyaku

Abstract: Mental models, or internal representations that structure an external environment, facilitate the interpretation of complex systems and guide individual decision-making. Understanding mental models of systems can therefore help identify barriers to effective system management. This workshop introduces a new tool to measure stakeholder’s mental models of any complex system. This tool is the first to offer a standardized approach for eliciting mental models to 1) compare mental models between stakeholders, 2) compare mental models with the true state of a system, 3) measure a change in mental models over time, or 4) simply to start a conversation between stakeholders on the functioning of a system and how to address challenges within the system. This tool therefore allows system dynamics researchers to broaden their system research by representing stakeholders’ views of the system of interest. This free and open-access tool can be tailored to the researcher’s needs to capture perceptions of any system, and allows researchers to adapt both the task and instructions. The workshop will give participants a clear idea on how the tool can benefit system dynamics research, how to use the software, and provides participants the opportunity to explore how they can use M-Tool for their own research.  

Requirements Level:  Everyone
Participants should bring:  Laptop or tablet
Advance Preparation:  Participants will be provided with a list of further reading in the workshop and can be advised on specific literature relevant for their project during the workshop.

Practitioner's Approach for Model Ownership
by Michel Kuijer, Arjen Ros

Abstract: Basic starting point of this workshop is applying System Dynamics in the working processes of organisations e.g. for support in making their decisions and/or improving the substantiation/transparancy of their decisions. To make this work in practice it is necessary for the employees of those organisations that they are involved in the development of the model to make ittheir models (ownership) on which they can rely in preparing and making decisions. Different types of users in organisations can be recognized like the real users of the models, the management andthe management board. They all have to be involved and informed about the model development process and have to be able to give their input. Howqever: their time and availablity is limited. And also to gather differente stakeholders from diferent locations is hard: how to get them involved 'from a distance' e.g. virtually?

In jan 2019 we ended a MSc thesis study by EMSD students from Radboud University. We would like to present results and also challenge the participants  to give their ideas. We will conclude this participatroy workshop with a summary "guidelines for model ownership in a business context".

Requirements:  Level:  Everyone

Engaging Stakeholders: Peace Engineering in the Arctic
by Nancy Hayden, Bernard Amadei, Hajo Eicken, Asmeret Naugle

Abstract: Peace Engineering is the application of science and engineering principles and technology to promote and support peace.  This emerging discipline brings together the systems engineering community in academia, industry, and government with practitioners and researchers in the peacemaking, peace-building, peacekeeping, and security communities to explore the role of technologies in removing conflict drivers and barriers to peace, and to support environments in which human potential and well-being can flourish.  Practitioners of peace engineering must assess how technical solutions impact the peace, security and cultural values and trade-space relative to the systems of individuals, local communities, and societies within which the solutions are deployed. This workshop will interactively engage experts from the Peace, Security, Human Behavior, Development, and Environmental science fields to explore how systems analysis tools - such as system dynamics combined with ABM and discrete analysis - can best be used to inform decision-making through models of the peace-security-development dynamics at the community level in a case study of the Arctic, building on historical patterns of cooperation to inform new processes and mechanisms for accommodating commercial, security, and community interests in the face of climate change.

Requirements:  Level:  Everyone
Participants should bring:  laptop
Advance Preparation:  1)  Jordan, R. Peace Engineering I Webinar (2018).  Available from: http://www.ifees.net/peace-engineering-i/.  Accessed March 2, 2020.  2) Galtung, J. and D. Fischer, Eds. (2013). Johan Galtung: Pioneer of Peace Research; Springer Briefs on Pioneers in Science and Practice. New York, Springer.  3) Amadei, B., Engineering for Peace and Diplomacy (2019). Sustainability, 11, doi:10.3390/su11205646  4) Lanteigne, Marc, The changing shape of Arctic security (28 June 2019). NATO Review, https://www.nato.int/docu/review/2019/Also-in-2019/the-changing-shape-of-arctic-security/EN/index.htm. Accessed March 2, 2020.  5) Arctic Strategic Outlook, US Coast Guard (April 2019).  Washington, DC. https://www.uscg.mil/Portals/0/Images/arctic/Arctic_Strategic_Outlook_APR_2019.pdf. Accessed March 2, 2020.  6)  Changes in the Artic: Background and Issues for Congress (August 23, 2020). Congressional Research Service, R41153. Washington DC.  7) Alaskan Inuit Food Security Conceptual Framework: How to assess the Arctic from an Inuit perspective (2015). Inuit Circumpolar Council-Alaska, Anchorage, AK.  8) Challenges at America’s Northernmost Border (2018). Alaska Federation of Natives, Anchorage, AK.

Dealing with Grand Challenges - Multi-Scale Geo-Spatial Modelling and Simulation under Deep Uncertainty
by Erik Pruyt, Stefan Wigman, Tushith Islam

Abstract: During this hands-on workshop, partners of the Center for Policy, Exploration, Analysis, and Simulation (aka The PEAS Center) will demonstrate and share the secrets behind their script-augmented approach to build multi-scale System Dynamics models, connect multi-scale model to databases, generate interfaces and interactive web sites, simulate models under deep uncertainty, and use machine learning approaches to explore large uncertainty spaces in view of finding policies that are robust across many potential futures. This is an advanced workshop. We will use Vensim DSS. Python scripting knowledge is recommended but not necessary.

Requirements:  Level:  Advanced
Participants should bring:  Laptop.

Start Macro Modeling with a MacroLab20 Template
by David Wheat, Alina Novik, Marianna Oliskevych

Abstract: Want to get started with macroeconomic modeling?  Or, just curious about what’s involved?  If you teach economics or do economic research, or if you’re an armchair economist who likes to tinker with models, there is something in this workshop for you.  You will get a free 30-day version of Stella Architect plus the MacroLab template model.  During the workshop, guided instruction will help you use the template to build a simple country-specific model and jumpstart your macro modeling experience. Even experts may be interested in how MacroLab handles multiple industry and household types, ensures stock-flow consistency, and links the financial sector with firms, households, and government. Plus, you will receive data and instructions for teaching others how to get started. The template is a by-product of two decades of teaching macroeconomics and monetary policy with MacroLab and, more recently, developing system dynamics models for economic policy analysis in a few Eastern European countries.  The workshop will be conducted by a team of three experienced modelers, and you can choose whether to work alone or with a partner.

Requirements:  Level:  Everyone
Participants should bring:  laptop
Advance Preparation:  Prior to the conference, a sample model based on the MacroLab20 template will be available for online preview and simulation and a paper will be available.

Climate Action Simulation and En-ROADS Training
by John Sterman, Thomas Fiddaman, Travis Franck, Florian Kapmeier, Carolyn McCarthy, Rebecca Niles, Juliette Rooney-Varga

Abstract: Simulation-based roleplay with the global climate-energy simulation model En-ROADS for policy makers and educators. The climate and energy infrastructures are tightly coupled complex dynamical systems driven by multiple feedback processes, accumulations, time delays and nonlinearities. However, research shows poor understanding of these processes is widespread, even among highly educated people with technical backgrounds. Climate Interactive, MIT Sloan, UMass Lowell, and ESB Business School respond by offering the “Climate Action Simulation”, a simulation-based role-play exercise that helps a wide range of people try out and explore the policies and investment scenarios that allow them to reach their goals on climate change. With a focus on the mix of solutions that will lead to a more stable climate, this simulation can inspire hope that is grounded in our best understanding of the dynamics of the energy and climate system. The team will train participants in how to lead the workshop effectively. The workshop is organized into five sessions. Not all need to be attended.

Requirements:  Level:  Everyone
Participants should bring:  laptop
Advance Preparation:  It is not necessary for the participants to prepare the workshop. Just come and join. And then facilitate your own Climate Action Simulation. All materials are available online and for free: https://www.climateinteractive.org/tools/climate-action-simulation/

SUSTAIN: an SD-based boardgame for urban sustainability
by Stefano Armenia, Federico Barnabe, Rocco Scolozzi, Natalia Ciobanu, Georgios Tsaples

Abstract: The SUSTAIN boardgame has been developed as the main deliverable of an ERASMUS+ project, with an innovative perspective on urban sustainability. Its target is to promote the importance of sustainability on cities’ everyday problems among students in higher education, which are the policy makers of tomorrow and the ones that will shape our common future. The game and its rules have been developed following the development of a System Dynamics model aimed at tackling Urban Sustainability, and hence the objective of the game designers has been to try to reproduce, in the game, some of the realistic dynamics deriving from the SD-model simulations. The SUSTAIN board game, and its associated course, can be downloaded for free (by signing a Manifestation of interest letter) in its print&play form at the following link: http://sustainerasmus.eu/wp/

Requirements:  Level:  Everyone

Modeling Psycho-Social Dynamics
by Pascal Gambardella, David Lounsbury

Abstract: Many system dynamics models need psychological and sociological constructs to achieve their purpose. These constructs include intangibles like trust, motivation and morale. This workshop describes the modeling activities designed to transform these constructs into stock-and-flow structures. For each construct, first activity is to define it. The next two quantify it and operationalize it to transform it to a simulation variable. The last activities validate it and relate it to other variables in the model. We build upon our two previous deliveries of this workshop (2015, 2017). But, we illustrate this process with one major example instead of many smaller ones. Modeling-building activities in the workshop come from theory and case examples in Diermeier’s book “Reputation Rules (2011).” Exercises will focus on modeling reputational dynamics of an organization.  Relevant constructs include trust, moral outrage, empathy, expertise, transparency and commitment. The purpose of the model is to help companies to prepare for and handle a reputational crisis. Workshop exercises will help participants build skills that apply to their own psycho-social modeling aims. Link to materials: https://pascalgambardella.com/workshops-and-trainings/system-dynamics/

Requirements:  Level:  Everyone
Participants should bring:  A laptop.
Advance Preparation:  Review uploaded workshop materials. Review "Reputation Rules (2011)" by Daniel Diermeier (optional).

Introduction to the Loop Impact Method of Feedback Dominance Analysis
by John Hayward

Abstract: A central premise of system dynamics is that dynamical behaviour can be explained by model structure, especially its feedback loops. For example, the familiar S-shaped growth of the limits-to-growth archetype is explained using shifting loop dominance. Although such an explanation appears clear, what is less clear is how a loop is quantified, how dominance is defined, and what aspect of dynamical behaviour is being explained. These issues become more pronounced as the number of variables and feedback loops increases. 

This workshop will introduce participants to the Loop Impact Method of feedback dominance analysis. In the first session, participants will explore a number of models using the method’s definitions of behaviour, structure and dominance, and compare them with their own understanding of the model’s behaviour and structure. Models will be accessed using the isee exchange web platform.  

In the second session, participants will learn how to implement the Loop Impact method by adapting standard models in Stella Architect.  A variety of models will be available to accommodate participants’ expertise.  Participants should bring their own laptop. A conference edition of Stella will be provided.

Requirements:  Level:  Everyone
Participants should bring:  Laptop
Advance Preparation:  Hayward J. & Boswell G.P. Model Behaviour and the Concept of Loop Impact: A Practical Method. System Dynamics Review, 30(1), 29-57.  An awareness of the material, not a detailed understanding