https://blog.gongquiz.com/2020/11/29/hazop-%ea%b8%b0%eb%b2%95%ec%97%90%ec%84%9c-%ec%82%ac%ec%9a%a9%ed%95%98%eb%8a%94-%ea%b0%80%ec%9d%b4%eb%93%9c-%ec%9b%8c%eb%93%9c%ec%99%80-%ec%9d%98%eb%af%b8%ea%b0%80-%ec%9e%98%eb%aa%bb-%ec%97%b0/