spot check

1. 1.

   a check on work performance or product quality made at random times without warning

   “spot checks ensure a high level of performance by employees”

   Broadercheck

Questions about spot check

What does spot check mean?

spot check means "a check on work performance or product quality made at random times without warning".

Is spot check a common word?

spot check is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.