SIL Determination

Definition - What does SIL Determination mean?

SIL (Safety Integrity Level) Determination is the process of determining the amount of risk mitigation that is required to bring down the risk put forth by a process to a tolerable level. SIL Determination represents the first step in the developing, design, commissioning, and operating of a Safety Instrumented System (SIS).

Safeopedia explains SIL Determination

SIL Determination consists of the determination of the Safety Integrity Level (SIL) for each Safety Instrumented Function (SIF) within a Safety Instrumented System. The process is related to the overall risk from the unprotected hazards that can occur, and it is guided by the corporate standards for the tolerable risk after applying all the layers of protection.

Safety Integrity Level (SIL) Determination is a fundamental process undertaken to ensure a safety-related system satisfactorily performs the required safety functions under all stated conditions within the specified time period.

Inadequate or incomplete SIL Determination can compromise the safety integrity of the asset protection envelope and even place the asset integrity at risk. Properly defined SILs lead to significant cost improvements across all operating environments. Asset operational effectiveness can be achieved through regular testing of safety instrumented functions, which maintains SIL performance and optimizes the cost of ownership.

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