AirAsia Group* airlines have achieved the highest seven-star rankings after a new audit by AirlineRatings.com. SEE the Rating comparisons here. All of the airlines in the group have now passed the major international safety audit, the International Air Transport Association Operation Safety Audit (IOSA), which covers more than 1060 separate parameters. The operational safety audit is compulsory for IATA members and airlines that have completed the audit have a safety record almost four times better than those that have not. Also, a new audit of incidents and operational processes has revealed a significant decline, even taking into account the huge, in some cases, reduction in travel. Three years ago the AirAsia Group formed two independent internal departments – Group Safety and Group Operational Quality Assurance to oversee safety and quality assurance for all AOCs (Air Operator Certificates). SEE: Incredible vision of BA tail strike in wild weather SEE: The World’s Top Twenty Safest Airlines  SEE: Amazing AN225 landing in fog An Air Operator’s Certificate (AOC) is the approval granted by a country's regulator to an aircraft operator to allow it to use aircraft for commercial purposes. Both Group departments have been working with all AOCs to strengthen safety and efficiency in all operational areas. *Except Indonesia AirAsia which is four-star. About AirlineRatings.com Airlineratings.com was developed to provide everyone in the world a one-stop shop for everything related to airlines, formed by a team of aviation editors, who have forensically researched nearly every airline in the world. Our rating system is rated from one to seven stars on safety – with seven being the highest ranking. Within each airline, you will find the country of origin, airline code, booking URL, and seat map information. The rating system takes into account a number of different factors related to audits from aviation’s governing bodies, lead associations, as well as the airlines, own safety data. Every airline has a safety rating breakdown so you can see exactly how they rate. Over 230 of the airlines on the site that carry 99 percent of the world’s passengers have a product rating. Given that low cost, regional and full-service carriers are so different we have constructed a different rating system for each which can be found within each airline