quality control
US /ˈkwɑː.lə.ti kənˈtroʊl/
UK /ˈkwɑː.lə.ti kənˈtroʊl/

1.
a system of maintaining standards in manufactured products by testing a sample of the output against the specification.
:
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The company implemented strict quality control measures to ensure product excellence.
•
He works in quality control at a car manufacturing plant.