spotchecks

2. Short random tests done without warning to check quality or safety.

The factory runs spotchecks on the toys to make sure they are safe.

3. Brief unannounced visits to see if rules are being followed.

Health officers made spotchecks at several restaurants last night.

4. Quick looks at a small sample to judge the whole group.

We did spotchecks on the apples to see if the batch was fresh.