To: C. Yeager From: Acme Aviation Safety Consulting Services Good Evening, The Human Factors Analysis and Classification System is the expanded form of the short-form of HFACS deal (Karthick et al., 2020). There can be risky incidents taking place in the aviation industry because of irresponsibility shown by aviation industry employees. The major causes for these incidents can be recognized with the help of application of HFACS (Karthick et al., 2020). Preventive training is another important aspect of this system because employees of the aviation organizations can obtain this training from this system (Karthick et al., 2020). Software, Hardware, Environment, Liveware and Liveware other is the expanded form of the short-form of SHELL (Karthick et al., 2020). There is revelation of human interfaces in case of application of this model (Karthick et al., 2020). However, there can be creation of problems with these interfaces. The human relation with technological components is the aspect which is emphasized by this model (Karthick et al., 2020).