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LJU
BREM
LAN
AMS
BRU
DUB MAN
LON TC
PAL
Lower Airspace
Lower Airspace
Days with en-route delay > 1min/flight
<= 30 days
> 30 days
> 100 days
2008
LIS
CAN
ANK
SCO
SHA
ROM
MAD
STO
BRE
BOD
LON WAR
IST
BAR
TAM
BUC
MAA
SIM
KIE
ATH+MAK
MAR
MAL
STA
MAL
NIC
BOR
RHE
SEV
BRI
KHA
ROV
COP
SOF
LVO
ZAG BEO
OSL
VIL
TAL
WIE
PRA
REI
RIG
PAD
BUD
MUN ODE
TIR
PAR
BRAT CHI
GENZUR YER
SKO
LJU
BREM
LAN
AMS
BRU
DUB MAN
LON TC
PAL
Lower Airspace
Lower Airspace
Days with en-route delay > 1min/flight
<= 30 days
> 30 days
> 100 days
2009
Figure 60: Geographical distribution of most delay-generating ACCs
5.2.28 The responsibility to plan and to deliver the right level of capacity lies with ANSPs.
EUROCONTROL supports the European medium term capacity planning with a number
of tools, data sets and traffic scenarios. The resulting capacity plans are then published in
the Network Operations Plan (NOP). The next section compares actual and planned
performance for the most constraining ACCs in order to better understand the reasons for
the observed en-route capacity shortfalls.
ACC CAPACITY PLANNING
5.2.29 To ensure the required delivery of en-route capacity in the medium-term, capacity plans
are developed by the ANSPs for each ACC. Figure 61 compares actual traffic demand
PRR 2009 Chapter 5: Operational En-route Performance
49
and ATFM delays to the forecast levels in the Medium Term Capacity Plan15 for the 10
most en-route delay generating ACCs in 2009.
5.2.30 Zagreb is the only ACC which reported an increase in traffic which was not foreseen by
the traffic forecast. In all other ACCs traffic decrease in summer was even higher than
initially forecast.
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
minutes/ flight
Actual delay
(Summer)
Delay forecast
-16%
-14%
-12%
-10%
-8%
-6%
-4%
-2%
0%
2%
4%
Warszawa
Nicosia
Wien
Madrid
Zurich
Rhein/
Karlsruhe
Langen
Zagreb
Athinai+
Macedonia
Canarias
traffic growth (%)
Actual traffic
(Summer)
Traffic forecast
Sources: NOP, CFMU
Traffic growth
Actual and forecast
(SUMMER)
ATFM en-route delay
Actual and forecast
(SUMMER)
Figure 61: Accuracy of capacity planning (Summer 2009)
5.2.31 Although traffic was lower than forecast, Warsaw, Nicosia, Zurich, Langen, and
Athinai/Macedonia performed worse than anticipated, but for different reasons. Nicosia,
Langen, Athens and Makedonia ACCs did not fulfil the commitments made in the
capacity plan in terms of configurations and sector opening schemes.
0
0.5
1
1.5
2
2.5
3
2002
2003
2004
2005
2006
2007
2008
2009
Elementary Sectors Combined Sectors
source : EUROCONTROL/CFMU
Top 25 most delay generating en-route sectors
million min. of en-route delay 0
200 400 600
WARSAW
LANGEN
ATHINAI
CYPRUS
ZURICH
MADRID
KARLSRUHE
MAKEDONIA
WIEN
PRAHA
ZAGREB
En-route ATFM delay (' 000 min.)
Summer
2009
Figure 62: ATFM delays due to combined/elementary sectors
15 Forecast source: STATFOR medium-term forecast.
PRR 2009 Chapter 5: Operational En-route Performance
50
5.2.32 Figure 62 shows the en-route ATFM delays in the top 25 most delay generating en-route
ACCs by sector type in summer. The ATFM en-route delays originating from collapsed
sectors show a worrying increase between 2007 and 2009.
5.2.33 Zurich, Langen and Warsaw show en-route ATFM
delay due to elementary sectors. This indicates
structural limitations to be addressed to avoid
excessive delays when traffic growth resumes.
5.2.34 At all other ACCs, shortcomings in the planning
(recruitment, productivity projections, etc.) and
deployment (sector opening times, ATCO rating,
rostering, overtime regulation, etc.) of staff appear
to be the main reason for the observed high level of
en-route ATFM delays.
Elementary/ collapsed sectors:
The airspace is divided into elementary
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Performance Review Report 2009(41)
