Flight Delays Cancellations Trend(1995-1999)(Bratu and Barnhart, 2002) Significant increase(80%)in flights delayed more than 45 min Significant increase(500%)in the number of cancelled flights Year 2000 ( Bratu and Barnhart, 2002) 30% of flights delayed >3.5% of flights cancelled Future: Air traffic in US is expected to double in the next 10-15 years (Schaefer et al. (2001) Each 1% increase in air traffic >a 5% increase in delays (Schaefer et al. (2001)) Lead to more frequent and serious delay and schedule disruptions 55 Flight Delays & Cancellations Trend (1995-1999) (Bratu and Barnhart, 2002) ➢ Significant increase (80%) in flights delayed more than 45 min ➢ Significant increase (500%) in the number of cancelled flights Year 2000 (Bratu and Barnhart, 2002) ➢ 30% of flights delayed ➢ 3.5% of flights cancelled Future: ➢ Air traffic in US is expected to double in the next 10-15 years (Schaefer et al. (2001)) ➢ Each 1% increase in air traffic → a 5% increase in delays (Schaefer et al. (2001)) ➢ Lead to more frequent and serious delay and schedule disruptions