Both construction quality and safety have a deep impact on society. Deficiencies and defects can affect the lives of citizens most directly in the case of housing, but indirectly too in public works, both due to economic cost – which can be very high – and to the social cost of disturbances caused by the repair or restoration of functional conditions. Added to this is a growing commitment to environmental issues in our society, for which sustainability is an increasingly important factor. Accredited services contribute to improving the safety and quality of construction and reducing its environmental impact.