Hello Karen,
Once the SCs are imported in tab DEV, you have to import the track in NWDS.
Then you synchronize with the DTR, check-out the source resource from DTR and/or create your DC in an Activity.
When the code is ready to be build centrally (in CBS) and Consolidated, then you check-in the resource.
Once the activities are released, they have to be activated in CBS.
And in this point in CMS - Transport Studio - tab Consolidation, you will see the SCs ready to be imported. You do an import in CONSOLIDATION.
This will trigger additional Build in CBS Consolidation Buildspace.
If successful the SCs will appear in tab ASSEMBLY. Once assembled you might deploy to TEST or PRODUCTION system.
When successfully deployed, ONLY THEN, your customizations might be used by end users.
Regards