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JACDEC stands for Jet Airliner Crash Data Evaluation Centre, providing global safety analysis about commercial aviaion since 1989. The German founders Jan-Arwed Richter and Christian Wolf have written a number of books about aviation accidents (Jacdec books ). Since 2002 JACDEC developed under that term social research a global as a service, detailed information about an airline are with costs.〔(- Order page )〕 The JACDEC Safety Index was developed from their own (database ). The ''Centre'' also monitors current safety occurrences and provides updates on airline safety issues in social networks. ==JACDEC safety index== in the year 2002 JACDEC develoved The JACDEC Safety Index is a probabilistic measurement of past airline safety. The index is based on JACDEC now 12 years of accident analysis and a variety of official sources and documents of recognized institutions. During this time, the index every year got more complex and meaningful. It now has a level which allows us to compare the safety status of all the busiest airlines in the world combined. The JACDEC Safety Index calculation is currently based on eight basic components. # Annual Revenue Passengers Kilometers (RPKs): By using this number, we determine the flight performance of an airline. At nearly all major airlines, it is a default value. For calculating the index we use the cumulative RPK‘s – depending on the age of the airline – 30 years back. # Fatalities: For calculating the index we include all deaths among all occupants on board commercial passenger flights of an airline. (Time from boarding to de-boarding) For calculating the Index we use the number of victims – depending on the age of the airline – up to 30 years back. # Total losses: The so-called "Hull Losses" are another core component of the calculation. Thus all accidents, by definition, refer to operations where the aircraft is destroyed, or was no longer repairable. # Serious Incidents: This "ingredient" in our index calculation is still relatively new. Only since the "critical mass" of air accident authorities is achieved, generating the appropriate report density to be used to calculate in the JACDEC Index. The term "serious incident" is defined by international standards and referred to incidents where an accident was only narrowly avoided. A serious incident is weighted less than a Hull Loss. # Accident - Free Years" The number of years without a hull loss accident, backward from the current reference year to the most recent total loss (Hull Loss) of an airline. The more accident-free years an airline got, the better the relationship between flight performance and accident history resulting in an improvement of the JACDEC Safety Index. # IOSA Membership" Is an airline through the IOSA audit successful and receive an unqualified certificate, this is also included in the index. IOSA stands for "IATA Operational Safety Audit" to determine a recognized program of the airline association IATA, to operational structures and quality management within an airline. Meanwhile, over 300 airlines have received an IOSA certificate. Although an IOSA membership has little impact on our index, airlines that doesn´t have it were downgraded by a small quantum. (IOSA website ) # The Time Factor: When calculating the total accident history of an airline, we applied an time weighting factor (the Exponential Moving Average – EMA). This additional formula ensures that older accidents contributes to the safety index by a lesser degree than newer ones. The farther an accident is back in time, the weaker its impact. # Country Transparency: As a new component we introduced in 2013 was the transparency of the controlling authority of Aircraft Accident Investigation. Depending on which country we established different levels of transparency. Countries in the Level 1 best in terms of publication all relevant flight safety events in that particular country, Level 2 for single or only a few publications, and Level 3 for no publications of the Aircraft Accident Investigation, or the non-existence of the relevant authority. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「JACDEC」の詳細全文を読む スポンサード リンク
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