For the hazardous situations in the industry are reduced it is necessary that
machines and equipment are designed taking into account the risk reduction. This
research addresses two methodologies for risk assessment in industrial machinery.
The objective is to compare theoretically and practically the performance of the HRN
(STEEL, 1990) and SCRAM (SORANNO; GÖRNEMANN; SCHUMACHER, 2019)
methodologies. In addition, this research seeks to identify differences in results based
on the parameters used by each methodology, the influence on the result considering
the number of levels for each parameter and the influence of risk levels. The lack of
comparability between risk estimation methods can lead to uncertainty between results
obtained with different risk estimation tools. It should be noted that to identify the
hazards of a machine, it is necessary to carry out a risk assessment and apply safety
measures to reduce the risk. Machine risk estimation plays a crucial role in choosing
and prioritizing risk reduction methods. Conceptually, the probability of a specific
unwanted event occurring within a specific period, together with the consequences of
that specific event can be considered as a risk and to identify these risks, 20 (twenty)
risk scenarios were analyzed in an industrial plant in the State of São Paulo. The HRN
and SCRAM methodologies were applied in these risk scenarios and identified how
many risk scenarios showed identical results, how many risk scenarios showed similar
results and how many risk scenarios showed divergent results. Although it has not
presented identical results, it is not possible to state that one methodology is superior
to the other in terms of risk estimation.
