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10 Barriers to Success in Safety Integrity Level (SIL) determination

This FREE webinar was recorded on:
Thursday, September 19, 2013
05:00 PM - 06:00 PM BST

This FREE webinar is available to watch now.

ABB Resource Center

Many high hazard process operations rely on SIL rated safety systems to ensure their safe operations. However, there are many pitfalls in determining the appropriate target SIL for a safety system. Too low a SIL leads to unsafe operations, while too high a SIL leads to expensive and difficult to manage systems.

Determining the correct target SIL requires a detailed understanding of the hazardous events that the safety system is protecting against and any other protective systems that may prevent those events, or control their consequences. In simple systems the challenges for sound SIL determination are around estimating probabilities and assessing consequences – skilled tasks in themselves. Complex systems are much more challenging and understanding the relationships between protective systems, such as whether they are truly independent of each other, can be a minefield.

This free webinar will outline the challenges and issues associated with good SIL determination, will cover the common techniques used to determine SILs, including LOPA, and outline 10 common pitfalls that need to be overcome for successful SIL studies.

ABB Consulting has vast experience of working with high hazard operating companies across the world, conducting many types of risk assessment (HAZOP, LOPA, SIL determination etc.). The lessons learnt through ABB’s experiences will be shared in the webinar.

Some of the barriers to success that will be covered are;

  • Not adequately identifying and understanding the major hazards
  • Using over optimistic allowances for operator responses
  • Failing to build a competent study team
  • Not using the best information available
  • Failing to ensure the independence of protection layers

Watch the FREE webinar here.


Alan King
Principal Consultant In Risk Assessment
ABB Consulting

Alan is a Hazard and Reliability Specialist for ABB Consulting, responsible for technical leadership in hazard and risk quantification. A TÜV Certified Functional Safety Expert and author of many technical papers in the field of hazard analysis. Leadership of hazard study and other techniques for hazard identification within process plant design, control systems and instrumented protective systems. During a career in the hazardous process industries Alan has held various roles from product research scientist to principal risk consultant.

This FREE webinar is available to watch now.