نظارت بر عملکرد ایمنی و اندازه گیری واحد حمل و نقل شهری  Safety performance monitoring and measurement of civil aviation unit

1. Introduction Safety has always been the most significant issue for the operation of civil aviation units (CAU). In recent years, with the widely promotion of safety management system (SMS) in civil aviation, the operation of safety performance has brought new task and challenge to the CAUs (International Civil Aviation Organization, 2013). An SMS defines measurable performance outcomes to determine whether the system is truly operating in accordance with design expectations and not simply meeting regulatory requirements. In SMS, the safety performance indicators (SPIs) are used to monitor known safety risks, detect emerging safety risks and to determine any necessary corrective actions. The Federal Aviation Administration (FAA) publishes the performance and accountability report every year (Federal Aviation Administration, 2014). European Organisation for the Safety of Air Navigation (Eurocontrol) annually releases the performance review report on the assessment of air traffic management (ATM) in Europe (Eurocontrol, 2014). The FAA and Eurocontrol also jointly provide the comparison of ATMrelated operational performance of U.S. and Europe yearly (FAA & EUROCONTROL, 2014). In the academic field, Luo developed the risk assessment model and procedures for ATM (Luo et al., 2009a, 2009b). Shyur proposed a quantitative model for aviation safety risk assessment, where the model used data on both accident and safety indicators to quantify the aviation risk which are caused by human errors (Shyur, 2008). Lee developed a quantitative model for assessing aviation safety risk factors as a means of increasing the effectiveness of safety risk management system by integrating the fuzzy linguistic scale method, failure mode, effects and criticality analysis principle (Lee, 2006). In spite of plenty of standards, specifications and papers on SMS released by civil aviation organizations and scholars, these documents mainly focus on hazard identification and risk control, lacking of a detailed method for CAU’s SPI monitoring and safety performance measurement. In this paper, a specific method is proposed for safety performance measurement based on the analytic hierarchy process (AHP) and Delphi method, called the DAHP model, providing the basement for CAU’s safety management. The remaining of this paper is organized as follows. In Section 2, the DAHP model is described in detail. Then, Section 3 describes the standards for the SPI monitoring and measurement, and in Section 4, a case is discussed on the safety performance process of a regional CAU in China. Some conclusions close the paper in Section 5.