Modeling the Real World Vensim is simulation software for improving the performance of real systems. Vensim is used for developing, analyzing, and packaging dynamic feedback models. We emphasize: High quality, with dimensional consistency and Reality Checks™ Connections to data and sophisticated calibration methods Instant output with continuous simulation in SyntheSim Flexible model publication Model analysis, including optimization and Monte Carlo simulation Vensim contains many industry-leading technical advances in simulation technology. Read more about: Causal Tracing™ Subscripting Optimization Venapp Flight Simulators (Learning Environments) Resource Allocation algorithms (ALLOC P) Configurations See our Comparison Chart for different Vensim configurations Professional & DSS Read the Vensim Brochure. Vensim Professional is what is needed for managing large and complicated models. It provides Causal TracingTM of structure and behavior, and has Monte Carlo sensitivity, optimization and subscripting (array) capabilities. Vensim DSS adds an interface development tool for creating management flight simulators, external functions and macros, compiled simulations, and more. Custom Vensim applications (flight simulators and other interfaces to models) can be developed with the Venapp builder, or in a programming language such as Visual Basic, C, C++, Visual C++, Delphi, Excel, and multimedia authoring tools, or in Sable (below). PLE Plus Vensim PLE Plus bridges the gap between the inexpensive (or free) PLE and our higher configurations. PLE Plus is fully featured for its price point and includes data connectivity, multiple views, Monte Carlo sensitivity simulations, game simulations, and the new model-user interface (Input and Output Controls). PLE Vensim PLE (Personal Learning Edition) is software that gets you started in system dynamics modeling and is free for educational use and inexpensive for commercial use. Vensim PLE is ideal for classroom use and personal learning of system dynamics.