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more efficiency and dynamic capability in airborne strategic route planning will be an important part of the an overall Free Flight concept because greater route flexibility and a more efficient ATM system ultimately depend on the ability to strategically plan, predict, and coordinate the movement of individual aircraft in the airspace for purposes of traffic flow management.
2.1 Method
Because the overall objective of this program is to develop a flight deck functional concept for strategic flight planning/replanning, and because such a concept would be used primarily in the process of in-flight replanning, we wanted to ensure that all of the current goals, functions, constraints, information, and resulting inefficiencies in flight planning and replanning were adequately represented and accounted for in our study. A general overview of this process is shown in Figure 1.
Figure 1. Process for conducting study
First, we interviewed flight dispatchers from a variety of aircraft operators to better understand and document the planning and replanning processes currently being used. These subject matter experts were selected from several major airlines with sophisticated AOC support, a small, niche market airline with minimal AOC support, a business jet fleet operator, a major cargo carrier, and a general aviation pilot. In each case, we followed a structured interview format that was intended to identify stakeholders and goals, planning/replanning sub-functions, what constraints were managed, what information was used and where it came from, and what inefficiencies were encountered, both for planning and for replanning. We also interviewed air traffic facilities personnel to get their perspective on flight planning/replanning as related to air traffic management goals.
2.2 Results
The “raw” data from the operator interviews are included in Appendix B. The results are summarized below, highlighting the significant operator class commonalties and distinctions for flight planning and replanning. The summary is intentionally brief and selective, and interested readers are encouraged to read the raw interview data; there are many interesting comments and insights that are not captured here. The results are divided into descriptions of planning and replanning, and then under each category, common descriptions that apply to all operator classes are presented first, then descriptions unique to each operator class are presented. In the replanning description, information processing (IP) tasks are introduced as a useful way to illustrate differences among operator classes in allocation of replanning tasks to stakeholders. Finally, since replanning is the focus here, a typical replanning scenario is described from the perspective of ATC and each operator class to help illustrate differences in replanning perspectives among operator classes and stakeholders.
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