@article{ref1,
title="Multi-Level Fuzzy Evaluation Method for Civil Aviation System Safety",
journal="Xinan Jiaotong Daxue Xuebao",
year="2007",
author="Ma, G and Mi, W and Liu, Xijuan",
volume="42",
number="1",
pages="104-109",
abstract="An index system was proposed for safety assessment of civil aviation systems. Fuzzy comprehensive evaluation method was used to calculate the safety degrees corresponding to management and to the human-machine-environment system composed of flight, support and maintenance subsystems. The comprehensive safety degree was obtained based on the above degrees, and divided into 5 grades. The system is not safe enough if the comprehensive safety degree is under grade 4. A further evaluation to the data can reveal the possible hints that cause the data to be evaluated as 'bad' or 'very bad', so that precautions can be taken accordingly.<p />",
language="",
issn="0258-2724",
doi="",
url="http://dx.doi.org/"
}