Organizational Safety Risk Analysis in Aviation Industry; An STP a Based Framework

Abstract

ICAO recent manuals for both State Safety Policy (SSP) and Safety Management System (SMS) explicitly concentrate on the organizational roots of accidents. The Safety Risk Management (SRM) system, as the core component of both SSP and SMS, consequently are expected to manage the organizational safety risk. In view of that, this paper present a new risk analysis framework that can be feasible to apply as the analyzing logic of the formal SRM; especially, in the start line of the risk management process. For this reason, the framework is founded on the System Theoretic Process Analysis (STPA) to cope with the sociotechnical feature of aviation organization. To apply STPA as the base of the framework, a customized "Feedback Control Loop" is applied to model organizational control mechanisms and extracts their hidden hazards. Furthermore, an innovative concept and procedure are introduced for "Hazard Activation Likelihood" estimation and "HazardConsequences"analysis.