The Design Environment provides facilities for creating parameterized models and for adjusting these models using a graphical user interface (GUI).

The key to a parameterized model is the definition of numerical data through variables and expressions. All material data, boundary conditions and the finite element mesh definitions can be set as parameters. The geometry of any device is defined through the use of constraints - these define geometric relationships linking the various points of the device. This method of defining a device's geometry is powerful and flexible and allows for complete control.