Hiya Justin, hard to say. For standard practice, we do sometimes impose artificial "stops" in the technique to add tests for posture, alignment etc. For faster practice, we include "stubborness" training where uke is expected (tries?)to ruin your technique by spotting gaps in your execution.
Having said that, some techniques do depend to a degree on your fluid execution of that technique, which makes testing your posture etc. rather problematical because if you do stop the technique will fail.
Ideally I suppose, always in control and on posture, but randori makes a mockery of us all...