臺灣營造業職災居各業之首，層出不窮的工程災害排除人為因素，氣候及地理環境對危害風險影響最大。
本研究將降雨等級、風力等級、土壤排水性、防護設備以及出工可能性等語意變數納入考慮，結合專家經驗建構危害頻率、危害風險與安全等級的相互關係，可有效評量雨量對作業安全等級之影響。並可依據安全等級與防護設施之if-then法則式，推估出工與否。

The occupational accident of construction industry is the highest among all industries in Taiwan. Without improper management, the most important factors to result in various labor accidents are weather factor and geographical.
The research took into account linguistic variables such as rainfall level, wind's level, soil drainage, protection facilities, and chance of work. Build the interaction among hazard frequency, hazard risk and safety level with expert experience. It can effectively evaluate the influence of rainfall on operational safety level. And according to IF-THEN rules of safety level and protection equipment, we evaluate whether it is appropriate or not to work.

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