preliminary evaluation of flight delay propagation ... - ATM Seminar

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4. Viewing the DataThe color box chart seen in Figure 3 below is a plotof the raw DM data. By observing the distributionof the darker colors the trend of large DMs isobvious but anomalies of increasing initial delay anddecreasing DMs exist.RAW DATA DELAY MULTIPLIERSThe fitted data in Table 1. is shown in Figure 4.below and the anomalies are eliminated.FITTED DATA DELAY MULTIPLIERSFigure 46
Figure 5. below allows a simpler view of DM as afunction of initial delay and only three times of day:08:00, 13:00 and 18:00 local time. Of interest isboth the magnitude of the DMs and the slope of thetrend line.FITTED DATA DELAY MULTIPLIERS AT 3 TIME INTERVALS76DELAY MULTIPLIER543208001300180010:15 :30 :45 :60 1:15 1:30 1:45 2:00 2:15 2:30 2:45 3:00 3:15 3:30 3:45INITIAL DELAYFigure 5Figure 6. demonstrates an important conclusionabout using DMs to evaluate delay reduction. Thatis, that reducing large initial delay by even smallamounts can have a significant affect on total delayin an airline scheduleInitial Vs. Total Delay Reduction for 08:00 Arrivals300279.9250200Delay Minutes150141InitialDelayTotalDelay1009060503047.10.Figure 67
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Page 5: another delay multiplier datum. The
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