When an operation is carried out on a product in a workstation, the quality
inspector goes to the workstation and inspects the product. When the samples that he
has taken for the inspection are not confirming to the quality, he stops the machine and
identifies the reason for the deviation and corrects the problem, so that the produced
product thereafter conform to the specifications. This type of control prevents any
major quality setback after the production. This is an example for proactive control.