Putting the left and the right eye together.
Like the traditional post production, stereoscopic post production can be separate in basic steps like offline editing and finishing.
Although some editors prefer using a single eye dailies for the creative editing process, it is a better practice to edit or at least occassionaly check sequences in full stereo with the Stereoscopic Supervisor. Large parallax shifts from shot to shot can cause eye muscle strain and these issues are invisible unless the cuts are reviewed in full stereo.
Stereoscopic finishing deals with a range of complex issues that do not exist in 2D video such as geometry, color matching, horizontal image translation, etc.