The mer chandise categories considered to have a significant environmental impact, equal to qualification, provide for the supplier’s en vironmental management methods (for example, ISO 14001 certification) to be analyzed, while for the product categories presenting a high health and safety risk to be contracted, equal to 47% of all product categories under qualification, the suppli ers are evaluated by examining their com pany performance and the organizational and management quality in terms of their safety (for example, OHSAS 18001 certi fication).