It is the best solution when we do not have a previous CAD or it is insufficient.
Starting from the point cloud obtained by scanning, we create a polygonal model in "stl" format. This format includes the skin of the piece or surface.
In the case of needing a solid 3D CAD model of the part (similar to one got using Solidworks or Catia), we would proceed to perform a modeling, which can be modified and worked using any 3D modeling software.