AMC5 Safety
performance indicator (SPI) for monitoring ATFM over-deliveries
Regulation
(EU) 2019/317
At ATC
sector level, the ATFM over-deliveries (OVD) safety performance indicator
should be calculated as the ratio of 20-minute slices with over-delivery
aircraft in the ATFM regulated sector versus the total number of 20-minunte
slices during the ATFM regulated duration. To determine whether an hourly
slice is over-delivered, the number of actual flight entries in the regulated
sector (NB_FLT_ACTUAL) should be compared with the regulated flight rate for
the same time interval (REG_RATE) that is imposed in the ATFM regulation. When
the actual entries are above 110 % of the regulated rate, then the slice
should be considered over-delivered. The definition should exclude the
regulation with a zero rate (e.g. airspace closures) as it makes the
comparison meaningless.
The
Network Manager (NM) should report to EASA at the beginning of the application
period and subsequently, on an annual basis, the OVD SPI aggregated at each ACC and SES
areas. The time interval to monitor is each entire year. To aggregate the OVD SPI
for the combination of geographical area and yearly interval, the total number
of slices with over-delivery are divided by the total number of slices for the
regulations within the reporting scope.
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