Courtesy of Shan Lan, Cindy Barnhart and John-Paul Clarke. Used with permission New Approaches to Add robustness into Airline schedules Shan Lan, Cindy Barnhart and John-Paul clarke Center for Transportation and Logistics Massachusetts Institute of Technology May5,2002New Approaches to Add Robustness into Airline Schedules Shan Lan, Cindy Barnhart and John-Paul Clarke Center for Transportation and Logistics Massachusetts Institute of Technology May 5 , 2002 Courtesy of Shan Lan, Cindy Barnhart and John-Paul Clarke. Used with permission