“…This research is based on the critical analysis of several risk assessment methodologies and their application in building projects, during which the need to establish the parameters which best reflect the reality of the construction work environment was detected, spanning four techniques for combating risk (Safety at Work, Industrial Hygiene, Ergonomics and Psychosociology), taking risk tolerance into account. Where risk tolerance is concerned, other considerations are: the factor of the reality of the construction sector, which includes the risks associated with the complexity of the units of work, their location and interdependence [ 1 , 2 ]; the factor of the contractor’s economic response in terms of the direct implementation of construction systems and prevention methods [ 3 , 4 ]; and the social factor, including the interest, participation and the worker emotional states [ 5 , 6 ]. These factors span the documentary environment [ 7 , 8 ], the construction environment [ 9 , 10 , 11 , 12 ], and the social environment as fundamental elements associated with the execution of a project [ 5 , 9 , 13 , 14 , 15 ].…”