Answer:
The "Independent Mesh Preferred" option allows you to create FE meshes between different objects that are independent of each other.
The only requirement is that these objects are integrated into one another.
This method allows you to create an individual FE mesh for different objects. This way, you can reduce the number of FE elements and thus save the calculation time.
A floor slab on a soil massif can be mentioned here as a very good example. In this case, the solid of the soil massif can be modeled with a coarser FE mesh, and the FE mesh of the integrated floor slab can be refined at the same time.
