Risk Analysis on Leakage Failure of Natural Gas Pipelines by Fuzzy Bayesian Network with a Bow-Tie Model

Table 1

Weighting criteria of a group of experts.

	Constitution	Score
Professional position	Senior academic	8
	Junior academic	6
	Engineer	4
	Technician	2
	Worker	1
Service time	≥20 years	8
	15–20	6
	10–15	4
	5–10	2
	≤5	1
Education level	PhD	8
	Master	6
	Bachelor	4
	HND	2
	School level	1