Simgua 3.7:

• Ability to adjust model parameters and flows during a simulation
• Ability to restrict stocks to only positive values
• Improved method of entering units in equations (e.g. "{4 Meters}")
• Additional minor feature enhancements and stability improvements

Simgua 3.6:

• Unit Checking - specify the units in your model and Simgua automatically checks to see if your units are consistent
• Unit Conversion - automatically convert between compatible units
• Automatic model verification capabilities using upper and lower bounds for primitive values and dynamic live checks
• Enhanced Converter primitive allowing you to show only discrete data points
• Improved Material primitive
• Additional minor feature enhancements and stability improvements

Simgua 3.5:

• Multivariate Optimization
• Components 2.0 - components are now much more powerful and easier to use. Images and resources may now be embedded within components; and macros can now be executed at the start and completion of simulations
• Added additional default components: Histogram, Trend, Theil Decomposition and Pink Noise
• RandBinomial, RandNegativeBinomial, RandLognormal, RandPoisson, and RandGamma functions
• The behavior of serialized stocks has been adjusted so that removal from the stock occurs one time step earlier. This is the expected behavior for most and converges to the previous behavior as the time step goes to zero. However, some models might require updating due to this change.
• Added Aggregate function
• Folders can now be set to group primitives in the diagram in addition to the library browser
• Reorganized and improved manual
• Additional minor feature enhancements and stability improvements

Simgua 3.4.1 - 3.4.6:

• Added Max, Min, Mean, Median, and StdDev functions to analyze past primitive values
• Added a Months time unit
• Extended Rand function with optional maximum and minimum bounds
• Extended the Pulse function with a repeat option
• Added a function to generate exponentially distributed random numbers
• Added a single line IfThenElse function
• Improved the display of infinite numbers and charts containing them
• Improved Windows compatibility and interface appearance
• Stability enhancements and other minor feature additions

Simgua 3.4:

• Added the ability to set the simulation start time
• Smooth function to generate weighted averages of primitives' values
• Delay1 and Delay3 functions to generate exponential delays of primitives' values
• Ramp, Pulse, and Staircase functions to generate controlled inputs
• LOWESS macro function for analyzing data
• Added a greatly simplified approach to handling time. Some models may require updating to take advantage of the new system, download the Model Update Macro to automatically update models

Simgua 3.3:

• Added sensitivity analysis allowing you to explore the results of stochastic uncertainty
• Added fourth-order Runge Kutta solution algorithm resulting in more accurate simulations
• Stability enhancements and other minor feature additions

Simgua 3.2:

• Optimization allows you to set a goal of minimizing or maximizing a cost or some other value, and then to automatically determine the conditions that will achieve it
• Stability enhancements and other minor feature additions

Simgua 3.1:

• Model Publishing to put models on the internet
• Optimized file format for faster model saving and opening
• Improved Quick Code interface
• Stability enhancements and other minor feature additions

Simgua 3.0:

• Macro Support allows you to automate Simgua
• Built-in Risk Assessment
• Arrays to add depth to the model
• Modeling throttling to control simulation speed
• Many stability enhancements and other minor features enhancements

Simgua 2.8:

• Primitive value sliders to easily see the results of changing the values of a primitive
• Analysis Modes added to control the creation of new Analysis Windows
• Renamed the "Input" primitive to the "Converter" primitive
• General improvements and bug fixes

Simgua 2.7:

• Automatic update checks (can be disabled)
• Action-by-action Undo and Redo support
• 'SetRandSeed' function to set the seed used by the random number generator
• 'Speak' function uses speech synthesizer to vocalize text
• A new application icon
• Adjustable axis boundaries
• General improvements and bug fixes

Simgua 2.6:

• Built-in context-sensitive help
• General improvements and bug fixes

Simgua 2.5:

• Microsoft Windows support
• PDF serialization for stocks
• Many bug-fixes and general improvements

Simgua 2.0:

• Powerful new charting engine with a range of configurable styles and properties
• Greatly enhanced equation editor with automatic indentation and function completion
• General improvements and bug fixes

Simgua 1.0:

• Initial Release