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Table 14. Example Reporting of Airport APM Performance
Measure #3: O&M Expense per Vehicle Service Mile.
February 2010
Month Year-to-Date
W/Utilities W/O Utilities W/Utilities W/O Utilities
Expense Expense Expense Expense
O&M Expense
per Vehicle $24.05 $18.15 $20.45 $17.50
Service Mile
n
the APM may not be dedicated to only the APM services, but SC AO = SC AO_x
rather may be on a common upstream feed that branches off to x=A
the APM service and another non-APM service. In such a case, n
it may be difficult, if possible at all, to determine the expense AC P = AC P_x
for the APM service versus that of the non-APM service. In x=A
anticipation of this potential problem, it is recommended n
that for those systems that have dedicated meters/services, total AC AO = AC AO_x
x=A
O&M expenses be reported both with and without utilities
expenses. For those systems that share services with other
SC P_x = SNTP_x × CDC × SNCTP_x
non-APM services, total O&M expenses should be reported
without utilities expenses only.
SC AO_x = SNTAO_x × CDC × SNCTAO_x
To track performance over time, it is recommended that
O&M Expense per Vehicle Service Mile be calculated for the
AC P_x = ANTP_x × CDC × ANCTP_x
month and year, with those measures reported monthly to the
cent. The measure reported for the year is always cumulative-to-
AC AO_x = ANTAO_x × CDC × ANCTAO_x
date, and it resets upon the start of the new year. For example,
if the monthly report is being issued for the month of February Where:
for a particular year, the reported monthly measure would
be for the entire month of February, and the reported yearly ·SC = Scheduled capacity. The scheduled cumulative line
measure would be the cumulative measure of O&M Expense capacity.
per Vehicle Service Mile from January 1st through February ·AC = Actual capacity. The actual cumulative line capacity.
28th of that year. ·P = Peak periods.
An example of how O&M Expense per Vehicle Service ·AO = All other periods.
Mile performance measures could be reported for the month ·x = Train consist type (e.g., type A for a two-car train; type
of February, 2010, is provided in Table 14, and the Airport B for a three-car rain).
APM Performance Measures reporting form can be found in ·n = Number of train consist types.
Exhibit A as Form B. ·Trip = The departure of an in-service train from the scheduled
originating system terminal and arrival at the scheduled
5.3.6Airport APM Performance Measure #4: destination system terminal.
Actual and Scheduled Capacity · In-service train is a train located in the passenger-carrying
(Peak Versus All Other) portion of the system that passengers are able to use for
transport.
5.3.6.1Definition ·SNT = Scheduled number of trips. The scheduled number
Actual and Scheduled Capacity (Peak Versus All Other) is of trips departing from the busiest system terminal.
the comparison of actual cumulative line capacity to scheduled ·ANT = Actual number of trips. The actual number of trips
cumulative line capacity for peak periods versus all other departing from the busiest system terminal.
periods in an airport APM system. ·CDC = Car design capacity. The originally specified design
Actual and Scheduled Capacity (Peak Versus All Other) is capacity of the car, expressed as the number of passengers
defined as: per car. If this information is unavailable, then:
The number of passengers that can be accommodated in
n
SC P = SC P_x seats in a car (not including flip-up and stowable seats),
x=A plus
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The number of standee passengers that can be accom- the CCCS that is part of the ATS subsystem will have the func-
modated in a car based on one standing passenger for tionality to allow user-defined reports and/or performance
each 2.7 ft2 of standee floor area. Standee floor area is measures to be generated based on custom rules set by the user,
defined as the area available to standing passengers, and output data can be generated by the airport APM system
including the area occupied by flip-up and stowable seats itself. After the one-time setup of the performance measure in
(all non-fixed seats). the CCCS, most of what is needed thereafter are the incidental
·SNCT = Scheduled number of cars per trip. updates of eliminating incomplete trips, and perhaps not much
·ANCT = Actual number of cars per trip. more, depending on the sophistication of the CCCS and output
Where individual cars are not provided, the language data generated by the airport APM system. Control center
in this section is to apply to vehicles. See Section 5.1.6 for personnel usually perform these updates after each downtime
definitions and discussion of car, vehicle, and train. event or before their shifts are complete. In many cases, this
allows reports to be automatically generated, usually daily,
monthly, and/or yearly, directly by the CCCS. If this function-
5.3.6.2 Data Requirements and Sources
ality exists within the CCCS, it is recommended that it be used
The data and sources required to calculate Actual and since it could save time and effort.
Scheduled Capacity (Peak Versus All Other) are provided in Some CCCSs do not have the capability described previously
Table 15. but instead can dump the raw output data acquired from the
airport APM system automatically to a batch file or to some
other network location connected to the CCCS. This is typically
5.3.6.3Data Collection Techniques and Calculating
done at the end of the operating day or shortly thereafter. In
and Recording the Measure
this case it may be easiest to import the data into a spreadsheet
It is recommended that the collection of data for the Actual application having a file specifically developed to calculate
and Scheduled Capacity (Peak Versus All Other) performance and track this performance measure. The application and file
measure be accomplished daily since the measure may serve could be installed on a personal computer in the control center
a useful purpose in describing performance when reported so that staff there would have the same ability to keep the data
daily within an organization. This measure might also be current on each shift. It is assumed for the purpose of this
interesting when comparing it with the same measure for guidebook and this performance measure that airport APM
other airport APM systems, which can provide perspective on systems have the capability to provide the data requirements
the sizes of such systems. at least through the export of data files for use by control center
For this measure, most of the data will typically be collected and/or other personnel in their analysis and calculations of
from records and systems in the control center. In some cases, the performance measure discussed herein.
Table 15. Data requirements and sources, Airport APM Performance
Measure #4: Actual and Scheduled Capacity (Peak Versus All Other).
Data
Requirement Source
Scheduled arrival and departure
times, by car, vehicle, and train ATS subsystem of the ATC system;
1 number, of in-service trains at the typically recorded by the CCCS
terminal stations of each route in the
system
Actual arrival and departure times,
by car, vehicle, and train number, of ATS, CCCS
2
in-service trains at terminal stations
of each route in the system
System schedule, including
scheduled opening and closing times
of the system, scheduled start/end
times of service periods, scheduled ATS, CCCS
3
number of trains and cars or vehicles
per train to be in service, and
scheduled headway or departure
times
Conformed systems contract documents
4 Car design capacity (design loading) Authorized official from the operating
organization
