For Schematic we are using Mentor/Siemens DxDesigner and for Layout Xpedition.
We use also the Variant Manager within Mentor. With this we can set parts to no-load or change them in different assemblies.
As these informations are not available in the edif export, they are not visible in Creo View.
Therefore the request to change this and work together with Mentor for a better database.