Machinery Safety / System Safety

It is required in the industry to define the hazards and the resulting risks by predicting the environment and nearly all-possible future scenarios where the machine will interact with humans and could become dangerous. This concludes three important steps by doing the risk analysis. First there is a need to define the boarder of the machinery including all their interfaces. The next step will be to identify all possible hazards depending on the different life phases and usage modes. And the third step will be the estimation of risk. The last step is of course the most difficult, because there are very seldom real probabilities available. Usually, it will be done in an empirical way and estimated by experts with domain know-how. Several methods are available to have a systematic approach for estimating the risk for example RPN (Risk Priority Numbers), Risk graph, ALARP (As Low As Reasonably Practicable) and much more. Depending from the risk level it is necessary to define the mitigation measures as:

• inherent safe construction

• risk reduction by safeguarding or implementation of complementary protective measures

• risk mitigation measures by safety management or behaviour rules.

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