3D Parametric Design - A Means for Lifting Standardisation to a Higher Level

3D parametric design functionality of modern CAD systems offers the possibility to create some higher level standards for components or systems. Instead of picking out several of the many variants of a certain product class and declaring them standard, a family of variants is created which can be adapted to different requirements by adjusting a few parameters. The standard is represented by design rules especially by the relations between the dependent and the lead parameters. The challenging work is to create these relations, called the parameter model.