close the loop

Evidently by loose extension from control theory proper, regarding closed-loop control, or from programming, in which an inadvertently infinite loop (endless loop) needs to be closed in order to bring the programming task to successful completion.

close the loop (third-person singular simple present closes the loop, present participle closing the loop, simple past and past participle closed the loop)

1. (intransitive, corporate jargon) To follow up; to tie up loose ends; to resolve.

   Can you close the loop on this discussion by getting input from marketing and making a decision?