Supplier Certification and Development - SQA's Supplier Certification and Development allows you to distinguish between mediocre suppliers and advanced suppliers. It also provides the mechanism for advancing suppliers up the scale. Certification is applied at different levels, reflecting the status and criticality of suppliers. Entry-level certification ensures that all existing and potential suppliers meet your minimum performance requirements. Preferred supplier certification provides you with an opportunity to identify suppliers with whom you should be maintaining stronger supply relationships. Strategic supplier certification allows you to identify those suppliers who are capable of partnering with you to achieve world-class performance.