Subjective Workload Assessment during 48 Continuous Hours of LOS-F-H Operations

Abstract

Two operator workload (OWL) subjective rating scales were used to obtain judgments of workload during 48 hours of operation. The Task Load Index (TLX) and Overall Workload (OW) scales were administered to two crews during 48-hour operations. A 16-item symptoms ratings scale was also administered to investigate motion sickness and other physical ailments. Results indicated that workload increases across time. Factor analysis on the symptoms found three significant: (1) Heat; (2) Eyestrain/Headache; and (3) Allergy/Dust. Regression analyses suggest that OWL scores can be described as a combination of hour into mission and job being performed. These findings are discussed in the context of a methodology for assessing OWL.

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