ABSTRACT
The main objective of this chapter is to describe what a risk analysis is and what the main elements in risk analysis and risk assessment are. This is followed by description of a number of methods that are commonly applied in risk analysis. The methods described in this chapter are Preliminary Hazard Analysis (PHA), Safe Job Analysis (SJA), Failure Mode Effects and Criticality Analysis (FMECA), Hazard and Operability Analysis (HAZOP), and System Theoretic Process Analysis (STPA). These methods are also sometimes called hazard identification methods, although the methods also consider the consequences and the probability of the identified hazards. They all have in common, however, that the consequences and probability are not quantified, but typically ranked based on coarse categories.
