This chapter presents a brief overview of some of the more prominent accident causation models presented in the Human Factors literature. The model describes how each of the levels comprising safety critical systems is involved in safety management via the control of hazardous processes through laws, rules, and instructions. According to the framework, for systems to function safely, decisions made at the higher governmental, regulatory, and managerial levels of the system should be promulgated down and be reflected in the decisions and actions occurring at the lower levels. According to Rasmussen, accidents are typically 'waiting for release', the stage being set by the routine work practices of various actors working within the system. Finally, a more recently proposed accident model worthy of mention is the increasingly popular Systems Theoretic Accident Modelling and Processes (STAMP) model. System safety and accidents are thus viewed by STAMP as a control problem.