Point System Overview
08:00
08:15
08:30
Takeoff Window
Start
Takeoff Window
Start
Takeoff Window
Start
08:00 - 08:15
0800 – 0815 Take-Off Window
08:15 - 08:30
0815 - 0830 Take-Off Window
08:00 - 08:01
08:01 - 08:03
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08:04 - 08:06
08:06 - 08:07
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A
B
C
D
E
F
G
H
I
J
A
B
C
D
E
F
G
H
I
J
A
B
08:00
•
•
08:35
An early slot is an asset (more valuable than a late slot) – buy/sell earlier slot
If I want to take off early, I buy an earlier slot (#slots earlier = # points)
–
–
•
The seller earns points from buyer
Trade request to sell (earlier) slot must be made in Extended Virtual Queue
(>schedule pushback time)
If I want to take off later, I sell my earlier slot
–
–
The buyer spends points to get earlier slot. Buyer must be willing & “able”.
Able is = time available > time request
Point System Overview
•
Airline departure slots “missed” are assessed penalty if
ADFMS not notified early enough
–
–
•
ADFMS allows ‘falling back’ to later departure slot due to an
unforeseen circumstances
–
•
•
•
•
Notification needs to occur is prior to scheduled push-back time
Penalties suspended until threshold exceeded
Bump up/ compression by subsequent flights in queue to ensure queue
efficiency
Points awarded periodically / unused points expire periodically
Point exchange first-in first out (FIFO)
Unfilled departure slots can be acquired without exchanging
points
No buying when points < 0
Points Based on Periodic Reset
Airline XX
Week 20-Feb 27-Feb 6-Mar 13-Mar 20-Mar 27-Mar 3-Apr
Ending
4 week 40
40
Reset
Trade
20 15
10
Buys:
Trade
10
5
Sales:
Total: 40
20
5
15
40
35
35
10-Apr 17-Apr 24-Apr 1-May 8-May 15-May
40
40
20
10
10
45
20
20
10
10
40
Notes:
• Point total = Number of points added per period + Number of points added
by sales within the time period – Number of points subtracted with buys
within the time period.
• The example above is based on 40 points for 4 weeks.
Rolling Points Based on Weeks
Airline XX
Week
Ending
Weekly
Starting
Total
3 weeks
2 weeks
1 week
current
week
Buys
Sells
End of
Week Total
3 weeks
2 weeks
1 week
current
week
20-Feb 27-Feb 6-Mar 13-Mar 20-Mar 27-Mar 3-Apr 10-Apr
17-Apr 24-Apr 1-May 8-May
40
10
10
10
40
10
10
10
40
10
10
10
35
5
10
10
50
10
10
20
50
10
20
10
55
20
10
15
45
10
15
10
55
15
10
20
45
5
20
10
50
20
10
10
40
10
10
10
10
10
10
10
15
10
10
10
10
5
10
10
10
20
10
10
10
10
10
10
40
10
10
10
30
0
10
10
25
0
5
10
45
5
10
10
50
10
10
20
45
0
20
10
55
20
10
15
55
10
15
10
35
0
5
20
45
5
20
10
40
10
10
10
40
10
10
10
10
10
10
20
10
15
10
20
10
10
10
10
Expiring Points
10 points acquired each week
Point systems
Rolling Points
Periodic Reset
Trading patterns
Generally consistent trading
patterns over time.
Trading will likely vary based on
current time within reset period.
Unlimited points
Loss of points outside of
point total window removes
the possibility of unlimited
point totals
Reset period removes the
possibility of unlimited point
totals
Notes:
• Don’t want too many points thereby making everyone a buyer
• Don’t want too few points to where buying can’t be initiated
• Companies gathering large amounts of points needs to be avoided in order
to maintain interest in the program.
Points Per Company
Airline
9E
AA
CO
DL
OH
FL
NW
UA
US
WN
Total
Equal
Distribution
40
40
40
40
40
40
40
40
40
40
400
Based on % of scheduled
Flights
% of Flights
Points
1.6%
5.9%
2.5%
3.9%
2.2%
3.1%
4.3%
5.6%
46.9%
24.0%
6
24
10
15
9
12
17
22
188
96
400
Based on % of gates
% of Gates
Points
1.6%
5.9%
2.5%
3.9%
2.2%
3.1%
4.3%
5.6%
46.9%
24.0%
6
24
10
15
9
12
17
22
188
96
400
Notes:
•
System needs to appear fair
•
Companies can trade between their own flights without affecting their point totals.
•
Equal distribution
–
–
•
Companies with a lot of points per flight (e.g. 9e) tend to become buyers as they will have surplus points
Companies with lower points per flight (e.g. US) may tend to trade within their own schedule at least for buys
Varying points by airport use
–
–
Companies with lower points (e.g. 9E – 6 points) have a difficult time initiating trading until they can sell some slots.
Companies with a lot of points (e.g. US – 188 points) tend to become buyers and can also trade within their own schedule.
Trade For An Earlier Departure
Processing Time
12 minutes (8 slots)
Trade Window
9:00am
8:00am
Recalculated
departure
(Blue)
Scheduled
Departures
Expected
Departures
Available for
Trade Slot
(Red)
Original
Departure
Slot (Blue)
Notes:
1. Each slot is 1 minute & 30 seconds.
2. The processing of the change needs to occur prior to the recalculated
expected departure time. This may or may not be the same as the
current expected departure time because of the difference in location of
the aircraft making the switch.
Trade For A Later Departure
Processing Time
12 minutes (8 slots)
Trade Window
9:00am
8:00am
Recalculated
departure
(Blue)
Scheduled
Departures
Expected
Departures
Original
Departure
Slot (Blue)
Available for
Trade Slot
(Red)
Notes:
1. Each slot is 1 minute & 30 seconds.
2. The processing of the change needs to occur prior to the recalculated
expected departure time. This may or may not be the same as the
current expected departure time because of the difference in location of
the aircraft making the switch.
Later Departure Slot Excursions
• Trade available (See previous slide)
• No trade available, open slot achieved through departure slot shifting
• No trade available, open slot available due to lack of traffic
• No trade available, no open slot available
Slot that needs to go later
Slots shifting
Unaffected slots