Answer: spotcheck

AnswerCrossword Clue
SPOTCHECKQuality control technique
SPOTCHECKSample
SPOTCHECKRandom sampling
SPOTCHECKCleaners' inspection?
SPOTCHECKRandom inspection
SPOTCHECKMake a ... (test at random).
SPOTCHECKAuditing technique