Advanced Hazard Assessment Techniques for SIL Determination

Topic Safety

CPD Hours 35.5

This is an IChemE approved training course and not delivered directly by the Institution. For more information about the course, contact the training provider directly.


Designed for those who need to understand the causes and sequence of failure that can lead to significant hazardous events occurring and be able to identify the key contributors to the level of risk. The course discusses how to quantify hazardous event likelihood using a range of techniques, in order to assess whether the level of risk is sufficiently low and, if not, where to focus attention for cost-effective improvement. It also considers instrumented protective systems and other risk reduction measures and assesses their actual benefit.

Additional dates are available visit the TÜV Rheinland Industrial Services website.

Learning outcomes

You should be able to demonstrate a working knowledge of SIL and hazard assessment including:

  • logical analysis using fault tree techniques for scenarios leading to hazardous events
  • use of data and its application to predict the likelihood of a hazardous event
  • development of practical hazard criteria 
  • handling of dependent or common mode failures
  • basic human error assessment
  • applying basic SIL and hazard assessment in a variety of situations to help in making more effective cost and effective decisions.

Who will benefit

  • Process design engineers creating more robust designs
  • Electrical, control and instrument engineers
  • Safety managers and advisors
  • Works or technical managers with responsibility for managing risk
  • Leaders of HAZOP studies thinking about multiple failures and how serious events occur

From the following industries:

  • petrochemical and chemical
  • batch and fine chemical
  • pharmaceutical
  • oil and gas
  • power and utility.

Course outline

  • International standards – IEC 61508/61511
  • Risk and criteria
  • Risk assessment
  • Consequence assessment
  • Layer of Protection Analysis (LOPA)
  • Event tree analysis
  • Reliability concepts of elements and states
  • Guided exercise – development of fault trees to assess hazards
  • Use and collection of reliability data
  • Trip system overview
  • Protective systems mathematics and assessment techniques
  • Limiting factors in PFDawg – common cause failures etc.
  • Failure dependency – key issues regarding dependent failure
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