Involving, according to their various responsibilities and competences, all key participants, nationally and locally, elected representatives, private bodies, industry, health professionals and professionals in other disciplines - and establishing appropriate structures for coordinating activities; Comparing the cost-efficiency ratios of the various specific measures to prevent accidents and lessen their consequences. ###>Comparer le rapport coût-efficacité des différentes mesures concrètes destinées à prévenir les accidents et à en réduire les conséquences.