关键词: |
us faa,air traffic controllers,labor force,task analysis/task load models, computerized simulation, en route, personnel management, airspace, traffic/task load models, computerized simulation, en route, personnel management, airspace, traffic |
摘要: |
The Federal Aviation Administration (FAA) is seeking to improve a mathematical model that estimates the time spent by controllers performing tasks in working the air traffic in each of the more than 750 sectors of the nations en route airspace. FAA has been using the models estimates of task time expenditure, or task load, to assess the number of controllers required to work each sectors traffic. The model simulates the traffic activity experienced in each sector and then associates task times with this activity to compute task load. While the task load values do not portray the total workload on controllerssince workload is driven by other factors such as stress, fatigue, and expertisethey can provide a consistent and objective source of information for controller staffing. It is for this reason that an earlier TRB report1 urged FAA to pursue task-based modeling for workforce planning. FAAs task load model is currently being used as one of several inputs in the agencys annual controller workforce plan (CWP). The modeled task loads are used to estimate the number of controllers required in position in each sector to perform the traffic-driven tasks, which FAA refers to as positions to traffic, or PTT. When a sector is open to traffic, it has at least one controller in position, the lead controller. Depending on traffic demand and other factors, the lead controller may be accompanied by an associate controller. Thus, PTT values are usually 1 or 2. When traffic is exceptionally heavy a third controller may be added to the team, although this setup is seldom a planned staffing configuration. Having used the PTT estimates from the model to inform the CWP for the past few years, FAA sought an independent review of the modeling process to assess its utility and validity going forward. Specifically, FAA asked the National Academies to convene an expert committee to examine and offer advice where appropriate for improving (a) the overall technical approach of task-based modeling, (b) input data and processes used for modeling traffic activity, (c) tasks and methods used to assign task times, and (d) means for validating model assumptions, parameters, and output. In addressing this charge, the committee was asked to be cognizant of the overall tradeoffs made due to data availability and to consider the adaptability of the approach to reflect changes in the tasks of controllers as their roles evolve over time. Key study findings with respect to each of these elements of the study charge are given next, followed by recommendations. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A05 / Corporate Author Code: 044780000 / Classifivation: Unclassified report |