期刊
RELIABILITY ENGINEERING & SYSTEM SAFETY
卷 150, 期 -, 页码 147-159出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ress.2016.01.024
关键词
Situation awareness; Situation awareness measurement; System evaluation; Decision support systems; Safety-critical systems
资金
- Australian Research Council (ARC) [DP140101366]
To ensure the safety of operations in safety-critical systems, it is necessary to maintain operators' situation awareness (SA) at a high level. A situation awareness support system (SASS) has therefore been developed to handle uncertain situations [1]. This paper aims to systematically evaluate the enhancement of SA in SASS by applying a multi-perspective approach. The approach consists of two SA metrics, SAGAT and SART, and one workload metric, NASA-TLX. The first two metrics are used for the direct objective and subjective measurement of SA, while the third is used to estimate operator workload. The approach is applied in a safety-critical environment called residue treater, located at a chemical plant in which a poor human-system interface reduced the operator's SA and caused one of the worst accidents in US history. A counterbalanced within-subjects experiment is performed using a virtual environment interface with and without the support of SASS. The results indicate that SASS improves operators' SA, and specifically has benefits for SA levels 2 and 3. In addition, it is concluded that SASS reduces operator workload, although further investigations in different environments with a larger number of participants have been suggested. (C) 2016. Elsevier Ltd. All rights reserved.
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