Several units from a random sample of units produced on Line 3 were found to...

When several units from a random sample are found to be defective, the immediate next action should be to segregate the defective units. This step is crucial to prevent defective units from being mixed with non-defective units, ensuring that they do not reach customers or proceed further in the production process. Segregating defective units helps in identifying the extent of the issue and facilitates further investigation and corrective actions.