Airline safety index rankings are based on the JACDEC (Jet Airliner Crash Data Evaluation Centre) annual safety calculations. International safety benchmarks such as IOSA and USOAP (Universal Safety Oversight Audit Programme) country factors are also a time weighting factor that increases the effects of recent accidents and weakens the impact of past accidents (ICAO, 2004., 2006); (ICAO USOAP 2011). Table 4 shows the criteria for calculating the safety index and the resulting safety index ranking, including the Annual Revenue Passengers Kilometres (RPKs) which measure of passenger traffic calculate with number of paying passengers multiply by kilometres flown, IOSA Membership and Country Transparency