One of the key advantages of IRONCAD is that it offers users the option of working in either "Innovative" or "Structured" part modes. Personally speaking, "Innovative" is my preference for simple 3D models, as they are fast to create and edit. However, "Structured" is my preference for complex 3D models (and 2D layout sketches). These require more thought and take longer to construct; however, these can be easier and faster to edit (changing parameters) than "Innovative" parts and assemblies.