Safety of machines and systems
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2.3.7 Validation
The last step should check whether the selected measures achieve the necessary risk
reduction and therefore, the protection objectives.
The result of the validation process is included in the final risk assessment.
The purpose of the validation process is to confirm the specification and level of conformity
of the design of safety-related parts of the control system (SRP/CS) within the overall spec-
ifications for the safety requirements of the machinery. Before validation of the design of the
SRP/CS or the combination of SRP/CS that contains the safety function, the specification
requirement for the safety function must be confirmed. Validation involves performing anal-
ysis and function tests under normal conditions in accordance with the validation plan.
EN ISO 13849-2 contains detailed requirements and describes the basic procedure for the
individual validation processes.
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