1. Releasing a GS into an Initial GDP

2. Is the current approach the right choice? Current procedure for issuing a GDP out of a FSM-issued GS –Non-GS flights are exempt by Time +45 –GS flights are exempt by Status GS flights that are not airborne WILL be included Receive additional delay from the GDP Note: This analysis does not represent the effects of releasing a GS into a GDP revision.

3. ORD 8/1/2000 Example 1st Tier GS into an All + Canada GDP

4. Current Method: Exempt flights by Time +45, GS flights by Status Exempt all non-GS flights by Time +45 and GS flights by Status –High number of exemptions Queue 1: Exempt flights –All airborne flights and all non-GS flights departing w/in 45 minutes Queue 2: Previously controlled –1st Tier GS flights Queue 3: Newly Controlled –All non-exempt, non-GS flights in program hours

5. Current Method: Exempt flights by Time +45, GS flights by Status Demand After the GDP Note there are no holes in delivery.

6. Alternative 1: Exempt all flights by Time +45 Releases GS flights –May generate excess demand due to large number of exempt flights –May lead to under-delivery in later program hours –High number of exempt flights for the GS flights with which to compete Queue 1: Exempt flights –Airborne flights and all flights departing within 45 minutes, including GS flights Queue 2: Previously controlled –(empty) Queue 3: Newly controlled –All non-exempt departing outside of 45 minutes

7. Alternative 1: Exempt all flights by Time +45 Demand After the GDP Note the hole in the 1900 due to the high number of exemptions.

8. Alternative 2: Exempt all flights by Status Exempt departures and GS flights by Status –Currently used only for releasing non-FSM GS –Includes all flights that are not airborne reducing number of exempt flights Queue 1: Exempt flights –Airborne flights Queue 2: Previously controlled –1st Tier GS flights Queue 3: Newly controlled –All non-exempt, non-GS flights in program hours

9. Alternative 2: Exempt all flights by Status Demand After the GDP Note there are no holes in delivery.

10. Exemption Options - Delays OptionsQueue# FlightsTotal Delay (min.)Ave. Delay per Flight (min.) exempt2459443.9 prev. controlled26169865.3 newly controlled3511672247.6 Total6221936431.1 exempt27114205.2 prev. controlled0*- - newly controlled3511672247.6 Total6221814229.1 exempt1817924.4 prev. controlled261927.4 newly controlled4151700240.9 Total6221798628.9 Time+45, GS flights by Status All flights by Time+45 All flights by Status * The GS flights are exempt from the GDP.

11. Exemption Options - The Pros and Cons Time +45, GS by Status All by Time +45 All by Status Pros -Exempts some flights by Time +45 -Exempts all flights by Time +45 -Reduces program’s total delay -Good for delivery -Reduces GS flights’ total delay -Reduces GS flights’ total delay -Good for delivery Cons -Increased delay for the GS flights-Holes in the program’s delivery -Only airborne exemptions -Increased total program delay-Increased total program delay

12. Conclusions Exempting flights by Status in this program proves to be the optimal method. It decreased the delay of the GS flights, decreased the total delay of the transition, and did not adversely effect the delivery of the program. A negative aspect of the exempt all flights by Status method is that flights within the Time +45 interval were given additional delay. However, that delay was less than the delay GS flights received in the exempt flight by Time +45,GS flights by Status method. The holes generated in the later program hours by the exempt all flights by Time +45 option were a result of the high number of exemptions. Note - This analysis does not represent the effects of releasing a GS into a GDP revision.