As a follow-up to the HAZOP and LOPA training, this video is a crash course on Safety Integrity Level study (SIL).

This is the approach used in the IEC 61508 and IEC 61511 standards.

‘What is SIL?’ is an introductory course about the basics of a Safety Integrity Level (SIL) Study.

The course outlines:

The key relationship between a Safety Instrumented Function (SIF) and SIL
How to calculate the reliability of a protection layer
How to access the requirements of independent protection layers
A SIF’s reliability is verified with a guided example to further your understanding.

This course summarizes the procedure to calculate and verify your safety equipment requirements.

This is the course for you!

For more courses like this, and a full certification course, visit


Icarus ORM Academy (2015) What is SIL? A Crash Course
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