Is this a full establish or an incremental establish (BCVs)?

All:

We run Oracle Applications on STDs and have a set of BCVs.  We want to split the BCVs, mount them on another server and have an Oracle Test run on the BCVs.  Let's say that the test will last for 3 days.  The STDs will stay in production and get changes.  The BCVs will get a bunch of changes over 3 days.  Now we're done and we want to re-establish the STDs -> BCVs.  Is that an incremental establish or a full establish?  Both sides have changed.  Can the incremental BCV "process" sort out the changes to both sides (STD and BCVs) and "remake" the BCVs from the STDs, or does the BCV process need to do a full establish of every track?

     Stuart