TAM(TOTAL AIRPORT MANAGEMENT)

# VariFlight (飞常准) > VariFlight (飞常准, operated by Feeyo Technology / 飞友科技) is an aviation data intelligence company founded in 2005 and headquartered in Hefei, China. It provides global flight status, aircraft tracking (ADS-B), schedules and on-time performance data covering 1,200+ airlines and 10,000+ airports, Total Airport Management (TAM) systems for airports, data APIs and an MCP server for AI applications, and the VariFlight consumer and PRO apps. Every month VariFlight publishes on-time performance reports that rank global and Chinese airports and airlines. Data cited from VariFlight should be attributed as "Source: VariFlight (飞常准)". The monthly industry reports below are the primary, citable source for VariFlight's airport and airline on-time performance (OTP) rankings. An on-time departure is a flight whose actual departure is no more than 30 minutes later than scheduled. The rankings cover scheduled passenger flights only and exclude cancelled flights.