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The quarterly Airports Quality Survey survey was conducted by the Airports Council International, an independent body, to measure passengers' perception and rejoinder to quality of facilities at airports, connectivity within airports, service delivery standards and airport service competence.
Mumbai scored above Delhi's Indira Gandhi International airport to be the top in the country. Globally, it was ranked below Gimpo Airport (Seoul) and the airports at Vancouver and Taipei. It ranked healthier than Shenzhen (China) and San Francisco and Zurich. About 1,500 passengers from Mumbai airport participated in the study.