SIL Validation

Last updated: July 30, 2017

What Does SIL Validation Mean?

SIL (Safety Integrity Level) Validation (SIL-V) is carried out to establish a “fit for purpose“ design of instrumented safety measures that are capable of mitigating hazards with respect to safety, environmental consequences, and economic loss.

Through inspection and testing of the installed and commissioned safety instrumented system and its associated safety instrumented functions, the SIL Validation method aims to determine if the stipulated requirements can be achieved as stated in the safety requirement specification.

Safeopedia Explains SIL Validation

SIL (Safety Integrity Level) classification is performed to validate, through inspection and testing, if the installed and commissioned safety instrumented system and its associated safety-instrumented functions are able to achieve the requirements as stated in the safety-requirement specification.

SIL Validation is carried out with the intent to allocate safety functions to protection layers, determine the associated safety integrity level for each safety instrumented function, and allocate safety functions to protection layers. It is carried out prior to the operation phase of the IEC 61511 safety lifecycle to put forth a plan for routine actions such as proof testing, maintenance override conditions, documentation of system demand and failure rates consistent with the Safety Integrity Level (SIL), verification calculations, audit and test documentation, and diagnostic and repair procedures.


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