It creates solid 3D models, as if they were real with a logical work flow which resembles the processes that would be used for producing a component. Some of these processes include extrusion, drilling and threading. Solid models can get the objects to intersect with each other, combine them or subtract one from another to create the desired component. Other advantages of Solid Modelling are as follows: The changes and parameters are saved at each stage of the modelling process and can be edited at any time during designing stage. Thereby, it allows the changes to be made on the design itself, rather than designing from scratch.