Later, were promulgated others standard references, which highlight the ISO 14001 in 1996 and OHSAS 18001 in 1999. This was too, the natural gradation of the certification processes in the organizations, i.e., started with the certification of quality management systems (QMS) followed by the environmental management systems (EMS) and after for the Occupational Health and Safety Management System (OHSMS). [43]