Strategic workload management and decision biases in aviation

Thirty pilots flew three simulated landing approaches under conditions of low, medium, and high workload. Workload conditions were created by varying time pressure and external communications requirements. Our interest was in how the pilots strategically managed or adapted to the increasing workload. We independently assessed the pilot's ranking of the priority of different discrete tasks during the approach and landing. Pilots were found to sacrifice some aspects of primary flight control as workload increased. For discrete tasks, increasing workload increased the amount of time in performing the high priority tasks, decreased the time in performing those of lowest priority, and did not affect duration of performance episodes or optimality of scheduling of tasks of any priority level. Individual differences analysis revealed that high-performing subjects scheduled discrete tasks earlier in the flight and shifted more often between different activities.

[1]  Christopher D. Wickens,et al.  The Effects of Stress on Pilot Judgment in a MIDIS Simulator , 1993 .

[2]  Sandra G. Hart,et al.  Crew workload-management strategies - A critical factor in system performance , 1989 .

[3]  A. Tversky,et al.  Judgment under Uncertainty: Heuristics and Biases , 1974, Science.

[4]  Ute Fischer,et al.  Efficient decision strategies on the flight deck , 1993 .

[5]  D. Kahneman,et al.  Attention and Effort , 1973 .

[6]  Sheila M. Puffer.  Task-Completion Schedules: Determinants and Consequences for Performance , 1989 .

[7]  C. Gersick.  MARKING TIME: PREDICTABLE TRANSITIONS IN TASK GROUPS , 1989 .

[8]  Thomas B. Sheridan,et al.  Dynamic Decisions and Work Load in Multitask Supervisory Control , 1980, IEEE Transactions on Systems, Man, and Cybernetics.

[9]  A. P. Sage,et al.  Information systems engineering for distributed decisionmaking , 1987, IEEE Transactions on Systems, Man, and Cybernetics.

[10]  David O'Hare,et al.  The 'Artful' Decision Maker: A Framework Model for Aeronautical Decision Making , 1992 .

[11]  B. Fischhoff,et al.  Perceived Informativeness of Facts. , 1977 .

[12]  Ravi S. Adapathya,et al.  Strategic Behavior, Workload, and Performance in Task Scheduling , 1991 .

[13]  R. Shankar.  Z-Scheduler: integrating theories on scheduling behavior into a computational model , 1991, Conference Proceedings 1991 IEEE International Conference on Systems, Man, and Cybernetics.

[14]  Barbara Hayes Roth.  Architectural foundations for real-time performance in intelligent agents , 1990 .

[15]  Christopher D. Wickens,et al.  Models of Multitask Situations , 1989 .

[16]  Kevin Corker,et al.  Engineering-Based Approaches to Human Performance Modeling , 1989 .

[17]  Judith Orasanu,et al.  DECISION-MAKING IN THE COCKPIT. , 1993 .

[18]  Christopher D. Wickens,et al.  Workload Assessment and Prediction , 1990 .

[19]  C. Wickens.  Engineering psychology and human performance, 2nd ed. , 1992 .

[20]  Everett A. Palmer,et al.  Measurement of taskload in the analysis of aircrew performance , 1993 .

[21]  Christopher D. Wickens,et al.  Workload management and geographic disorientation in aviation incidents: A review of the ASRS data base , 1993 .

[22]  Ronald L. Spooner,et al.  Utilization of Reliability Measurements in Bayesian Inference: Models and Human Performance , 1973 .

[23]  Kevin M. Corker,et al.  AN ARCHITECTURE AND MODEL FOR COGNITIVE ENGINEERING SIMULATION ANALYSIS: APPLICATION TO ADVANCED AVIATION AUTOMATION , 1993 .

[24]  Earl L. Wiener,et al.  Reflections on Human Error: Matters of Life and Death , 1989 .

[25]  B. Fischhoff,et al.  On the Psychology of Experimental Surprises. , 1977 .

[26]  D Gopher,et al.  A Selective Attention Test as a Predictor of Success in Flight Training , 1982, Human factors.

[27]  E H McKinney.  Flight leads and crisis decision-making. , 1993, Aviation, space, and environmental medicine.

[28]  Ken Funk,et al.  Cockpit Task Management: Preliminary Definitions, Normative Theory, Error Taxonomy, and Design Recommendations , 1991 .

[29]  D. Gopher.  The skill of attention control: acquisition and execution of attention strategies , 1993 .

[30]  Earl L. Wiener.  Controlled Flight into Terrain Accidents: System-Induced Errors , 1977 .