Human Fatigue’s Effect on the Risk of Maritime Groundings - A Bayesian Network Modeling Approach

Published on Feb 1, 2014in Safety Science3.619
· DOI :10.1016/J.SSCI.2013.10.002
Muhammad Juned Akhtar3
Estimated H-index: 3
Ingrid Bouwer Utne20
Estimated H-index: 20
(NTNU: Norwegian University of Science and Technology)
The article introduces a general method for developing a Bayesian Network (BN) for modeling the risk of maritime ship accidents. A BN of human fatigue in the bridge management team and the risk of ship grounding is proposed. The qualitative part of the BN has been structured based on modifying the Human Factor Analysis and Classification System (HFACS). The quantitative part is based upon correlation analysis of fatigue-related factors identified from 93 accident investigation reports. The BN model shows that fatigue has a significant effect on the probability of grounding. A fatigued operator raises the probability of grounding of a large ship in long transit with 23%. Compared to the two watch system (6–6 and 12–12), the 8–4–4–8 watch system seems to generate the least fatigue. However, when manning level, which is influenced by the various watch schemes, is taken into account, the two watch system is preferable, leading to less fatigue and fewer groundings. The strongest fatigue-related factors related to top management are vessel certifications, manning resources, and quality control.
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