指標特性に基づく空港周辺における効率指標（KPI08）算出条件の選定 ---羽田・成田空港の到着交通流への適用---

抄録

Increasing air traffic demand and the need to reduce environmental impact have intensified the importance of quantitatively assessing Air Traffic Management (ATM) performance. Among the 23 KPIs defined by ICAO, KPI08 (Additional Time in Terminal Airspace) is a key metric for evaluating terminal-area efficiency; however, its calculated value depends on methodological choices that have not been sufficiently examined. This study examines calculation conditions for applying KPI08 to arrival flows at Tokyo International Airport and Narita International Airport, while maintaining international comparability. Using operational trajectory data, the study compares alternative conditions for the target airspace, entry-position classification, and reference-time estimation from the viewpoints of consistency with the KPI concept, stability, comparability, implementability, and interpretability. The results indicate that a 100NM circular airspace, eight- direction entry classification at 45° intervals, and reference times derived from actual flights with the shortest flight distances are appropriate calculation conditions for the two airports. The validity of the resulting KPI08 values is further supported through comparison with time adjustment estimated at the 100NM entry point using runway interval requirements.