“…Furthermore, external factors as the fifth level was introduced to optimize the framework (Chauvin, Lardjane, Morel, Clostermann, & Langard, 2013;Patterson & Shappell, 2010). With the development of the study, the approach has been applied to many fields, such as aviation (Daramola, 2014), maritime (Chauvin et al, 2013), mining (Lenné et al, 2012), railways (Madigan et al, 2016), and medicine (Elbardissi, Wiegmann, Dearani, & Daly, 2007).…”