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From page 42... ... 42 C H A P T E R 6 This chapter provides detailed guidance on preparing a DDFS. Key steps include defining parameters and estimating markets, fleet mix, flight times, gate/RON assignments, and passengers per flight. Read the entire page →
From page 43... ... How to Prepare a DDFS for Base Year and Future Conditions 43 • Section 6.8 Application of Constraints • Section 6.9 DDFS Updates • Section 6.10 Quality Assurance and Control 6.1 General Steps for Preparing a DDFS This section describes the initial steps required prior to preparing a DDFS and the general processes required to prepare a DDFS. Key initial steps include obtaining stakeholder input on assumptions and setting the stage (see Section 6.2) Read the entire page →
From page 44... ... 44 Guidebook for Preparing and Using Airport Design Day Flight Schedules oc es s g a d Q ua y ss u a ce St ak eh ol de rC oo rd in a on /C om m un ic a on Match Aircra Arrivals and Departures (See Exhibit 6.4) Idenfy Parameters Design Day Definion Treatment of Adjacent Days Gang/RON Rules DDFS Assign Gates/ Parking Posions (See Exhibit 6.5) Read the entire page →
From page 45... ... How to Prepare a DDFS for Base Year and Future Conditions 45 6.2 Setting the Stage Once stakeholder input has been obtained, staging steps, including the formulation of policy and facility assumptions, parameters, and data collection can be finalized. Determine Assumptions on Policies, Physical Constraints, and Future Airport Layouts If the DDFS is being prepared for future conditions, assumptions on future operating policies and physical constraints should be determined at this point. Read the entire page →
From page 46... ... 46 Guidebook for Preparing and Using Airport Design Day Flight Schedules and Wednesdays. Now, airlines are increasingly matching service to demand, resulting in a less homogeneous weekday schedule. Read the entire page →
From page 47... ... How to Prepare a DDFS for Base Year and Future Conditions 47 factors may be required. These adjustments include scaling back future seat capacity in the advance schedule to match current year-to-year growth, or adjusting the fleet mix in the advance schedule to match the airlines' current fleet mix. Read the entire page →
From page 48... ... 48 Guidebook for Preparing and Using Airport Design Day Flight Schedules The approach involves the following steps. Read the entire page →
From page 49... ... How to Prepare a DDFS for Base Year and Future Conditions 49 MARKET SHARE ASSUMPTIONS ANNUAL AIRCRAFT OPERATIONS FUTURE DESIGN DAY OPERATIONS BY MARKET AND AIRCRAFT TYPE (PROCEED TO EXHIBIT 6.4) Design Day Definion AIRCRAFT USE ASSUMPTIONS DISTANCE FREQUENCY AIRLINE STRATEGY ASSUMPTIONS MARKET SHARE FUTURE FLEET MIX Assumption/Input Data Input Intermediate Preparation Step Output Legend Note: Items in BOLD CAPS are required for future DDFSs, but not for base year DDFSs. Read the entire page →
From page 50... ... 50 Guidebook for Preparing and Using Airport Design Day Flight Schedules Identifying the airline then becomes important in determining O&D flows. Some nonstop markets may be viable for some airlines but not others. Read the entire page →
From page 51... ... How to Prepare a DDFS for Base Year and Future Conditions 51 markets are no longer in operation. This suggests that the thresholds for nonstop service may be shifting upwards. Read the entire page →
From page 52... ... 52 Guidebook for Preparing and Using Airport Design Day Flight Schedules e. Relationship among market size, average aircraft size, and flight frequency. Read the entire page →
From page 53... ... How to Prepare a DDFS for Base Year and Future Conditions 53 Typically there is a rough symmetry in the distribution of aircraft types and airlines between arrivals and departures within a given market pair, but the symmetry is not exact. Slight differences in aircraft types between arrivals and departures are not unusual and, in some cases, the total number of aircraft arrivals and departures does not match in a given market pair. Read the entire page →
From page 54... ... 54 Guidebook for Preparing and Using Airport Design Day Flight Schedules • Even when daily flight frequencies remain constant, flight times to individual markets change often. These changes most often are within 10 to 15 minutes of the prior scheduled time, but can be longer. Read the entire page →
From page 55... ... How to Prepare a DDFS for Base Year and Future Conditions 55 PEAK SPREADING FACTORS Exisng Flight Schedule FUTURE DESIGN DAY OPERATIONS BY MARKET AND AIRCRAFT TYPE (EXHIBITS 6.2 AND 6.3) FLIGHT TIME ASSUMPTIONS UPDATE EXISTING FLIGHTS TO REFLECT FUTURE FLEET MIX Pair Arrivals and Departures Ungated DDFS (Proceed to Exhibit 6.5) Read the entire page →
From page 56... ... 56 Guidebook for Preparing and Using Airport Design Day Flight Schedules arriving flight is delayed, a different aircraft than originally planned may be substituted for a scheduled departure. As a practical matter, this is difficult to model in a planning DDFS.) Read the entire page →
From page 57... ... How to Prepare a DDFS for Base Year and Future Conditions 57 The bottom-up strategy is advantageous when the airlines serving an airport are expected to change their strategies. For example, a change in the number of connecting banks will create a discrete change in the peak hour percentage. Read the entire page →
From page 58... ... 58 Guidebook for Preparing and Using Airport Design Day Flight Schedules factor is the ability to accommodate particular aircraft in terms of length and wingspan. Beyond that, airlines consider multiple factors when assigning flights to particular gates, with different airlines taking different approaches. Read the entire page →
From page 59... ... How to Prepare a DDFS for Base Year and Future Conditions 59 Balance Gate Use Un-Gated DDFS (see Exhibit 6.4) Gated DDFS (without Passengers) Read the entire page →
From page 60... ... 60 Guidebook for Preparing and Using Airport Design Day Flight Schedules to hour, but at any given time, a certain percentage of an airline's gates will have no flights scheduled to provide for unexpected aircraft. There are no general rules regarding the need for spare gates. Read the entire page →
From page 61... ... How to Prepare a DDFS for Base Year and Future Conditions 61 6.6 Forecasting Passengers by Flight When DDFSs are used for terminal and landside planning, they must be translated into passenger flows. This requires forecasting passenger loads from enplaning load factors and O&D/ connecting passenger splits for each flight. Read the entire page →
From page 62... ... 62 Guidebook for Preparing and Using Airport Design Day Flight Schedules (SFO) Read the entire page →
From page 63... ... How to Prepare a DDFS for Base Year and Future Conditions 63 and annual basis for U.S.-flag airlines. Some considerations are necessary when using these ratios because originating passengers to enplaned passengers ratios for a given flight will not always match market originating passengers to enplaned passengers ratios: a. Read the entire page →
From page 64... ... 64 Guidebook for Preparing and Using Airport Design Day Flight Schedules Tucson International Airport, and ATL to Albuquerque International Sunport, and so on, not just O&D passengers from ATL to DFW. For this reason, beyond O&D passengers need to be considered. Read the entire page →
From page 65... ... How to Prepare a DDFS for Base Year and Future Conditions 65 to enplaned passengers ratios to be more precisely defined by day of week and time of day. However, at many airports, especially those in the developing world, this type of data is not available. Read the entire page →
From page 66... ... 66 Guidebook for Preparing and Using Airport Design Day Flight Schedules FLEET MIX AND MARKET ASSUMPTIONS FUTURE CARGO MIX INTEGRATED CARRIERS DOMESTIC NONINTEGRATED CARRIERS INTERNATIONAL NONINTEGRATED CARRIERS Cargo Schedules (if available) ESTIMATE FUTURE FLIGHT TIMES AND PAIR FLIGHTS Cargo DDFS (with Parking Assignments) Read the entire page →
From page 67... ... How to Prepare a DDFS for Base Year and Future Conditions 67 Steps for Adding All-Cargo Airline Aircraft Operations to a DDFS 1. Collect relevant data. Read the entire page →
From page 68... ... 68 Guidebook for Preparing and Using Airport Design Day Flight Schedules FLEET MIX AND MARKET ASSUMPTIONS ESTIMATE FUTURE FLIGHT TIMES Air Taxi, General Aviaon, and Military DDFS (with Parking Assignments) Assign Parking Area Assumption/Input Data Input Intermediate Preparation Step Output Legend Note: Items in BOLD CAPS are required for future DDFSs, but not for base year DDFSs. Read the entire page →
From page 69... ... How to Prepare a DDFS for Base Year and Future Conditions 69 GA Aircraft Operations The available data for GA activity differ depending on whether the operators are flying under instrument flight rules (IFR) or visual flight rules (VFR) Read the entire page →
From page 70... ... 70 Guidebook for Preparing and Using Airport Design Day Flight Schedules Airspace/Airfield Constraints The effects of airspace/airfield constraints are often measured in terms of hourly throughput capacity. ACRP Report 79: Evaluating Airfield Capacity http://onlinepubs.trb.org/onlinepubs/ acrp/acrp_rpt_079.pdf provides guidance on ways to measure throughput capacity. Read the entire page →
From page 71... ... How to Prepare a DDFS for Base Year and Future Conditions 71 Landside Constraints The effect of landside constraints on DDFS preparation is similar to the effect of non-gate terminal building constraints. These constraints directly affect passengers and passengers adjust, to a point, by increasing lead times or changing to a ground transportation mode. Read the entire page →
From page 72... ... 72 Guidebook for Preparing and Using Airport Design Day Flight Schedules Some consultants use proprietary spreadsheet programs to help reduce and analyze the data, check DDFS control totals, ensure that numbers of arriving and departing connecting passengers are balanced, and help the gate assignment process. Some consultants also have internal broad guidelines for preparing DDFSs, such as assumptions regarding load factor triggers for up-gauging aircraft or adding flights. Read the entire page →

From page 42...

... 42 C H A P T E R 6 This chapter provides detailed guidance on preparing a DDFS. Key steps include defining parameters and estimating markets, fleet mix, flight times, gate/RON assignments, and passengers per flight.