Iran Occupational Health

Background and aims  methods: High risk organizations and industries such as oil and gas extraction, chemical and petrochemical industries, nuclear and aerospace industries and air traffic control organization, in addition to use of advanced technology, have complex social aspects as well. Recent studies have shown that the combination of advanced technology and social vague rules of such organizations, forming a complex system that encounter with a new type of risk. The type of risk that inaccessible to conventional risk analysis approaches.Therefore, in this paper, with comprehensive review of recent studies, the ineffectiveness of traditional risk analysis methods in complex socio-technical systems will prove and the roots of this inefficiency will analyze.