Wiktionary
nonperforming
a. not performing satisfactorily; not functioning well
Usage examples of "nonperforming".
And no state allowed its education department to force management changes in nonperforming schools.
And we can make sure that nonperforming teachers no longer handicap children who want to learn.
Congressman Allen hold up a folder in front of the television cameras and say he has proof that you have billions in nonperforming loans?