The Evolution of Technology in the workplace in the O&G industry carry this segment to a present dilemma, where in given situations, there is so much complexity that the system operability became quite complex too. In this context, the traditional ways to promote safety -regulations and procedures -can't deal with the demands from these complex system -like an offshore oil rig. Understand the evolution of these activities, and the increase of its complexity, can develop an adequate manner of perceive the interaction between the equipment, environment, organization and workers, especially with regard risks and safety issues to prevent losses. Thus, the natural step to keep up with this is to understand the Human Factors and related Non-Technical Skills that are integrated with these systems, forming the modern sociotechnical complex system. In this evolved Safety-II approach, the FRAM (Functional Resonance Analysis Method) appears as an adequate methodology to recognize and analyse, seeking to promote safety and productivity.