Are up-to-date records kept of acceptable/approved suppliers?
Are the records for supplier approval properly maintained and kept according to the defined retention period?
Do personnel with adequate product knowledge and skill set conduct supplier qualification?
Does the supplier ensure that their suppliers' quality system controls are effective, which includes corrective actions for any nonconforming product or incidents?
Does the supplier ensure that their suppliers' process controls are under SPC/ SQC where applicable?
Is the customer allowed to verify at source, or upon receipt, that purchased product conforms to specified requirements?
Is there a procedure for part approval which would include PPAP (Production Part Approval Process) if applicable? (i.e. tooling qualification, part qualification, etc.)