Section 7.4 states that rejected materials should be identified and controlled under a quarantine
system designed to prevent their unauthorized use in manufacturing. It is not an expectation that
it has to be physically separated, but a reliable system should be used. That could be by spatial
separation; it could be by locked cage; it could be by labels; it could be by chains; it could be by
computer system, as long as it is reliable to prevent unauthorized use.
