ABSTRACT
Preliminary risk analysis (PRA) is a hazard identification and risk analysis technique that identifies hazardous events, causes, and consequences and states risk control measures. The PRA is a good tool to identify hazards and define risk control measures, but it is not practical for direct risk control. In turn, checklists are practical and effective implementation tools. The PRA demands a formulary to register hazardous events, causes, consequences, and their category, risk, and emergency control measures. Registering many items can make the form bulky and cumbersome. Fault tree analysis is a hazard identification and risks analysis technique that can be either qualitative or quantitative. It unfolds a hazardous top event into demands and failures of control systems. Event tree analysis or risk series is a hazard identification and risk analysis technique that identifies sequences of events that can follow a hazardous event.
