IEC 61508 / 61511 SIL Determination Course

A practical training course in the appreciation of SIL determination to the technical requirements of IEC 61508 / 61511

Industry today relies upon safety systems to maintain and protect operating assets. Businesses seek to maintain operating effectiveness and reduce spurious trips whilst achieving a safety target appropriate to the circumstances. Fundamental to this process is the determination and implementation of the safety requirements for the safety system. From the IEC 61508 / 61511 standards, the Safety Integrity Level (SIL) is fundamental in ensuring a safety related system satisfactorily performs the required safety functions under all stated conditions within a defined time period.
It is an assessment of the risk reduction required to give a tolerable level of risk. Inappropriate SIL determination can affect the safety integrity of the asset protection envelope and may in some cases place the asset integrity under threat. In addition to this, unnecessary spend in capital and operational budgets can be incurred. In contrast, properly defined SILs allow for significant cost improvements to be achieved in both Greenfield and Brownfield operating environments. Asset operational effectiveness is ensured by periodic testing of safety instrumented functions to maintain SIL performance and optimise the cost of ownership.

The Course

On completion of the course, you should be able to:

- Understand the concepts of SIL determination and the principles of IEC 61508 / 61511  
- Explain the key terms and concepts which underpin a systematic consideration process for safety and protective systems in respect to SIL  
- Understand the importance of SIL determination   
- Determine where present practice is in line with the requirements of these standards and identify where improvements are necessary   
- Implement the SIL determination methodology

Course structure and content

- A two-day technical course aimed at responsible managers and engineers   
- Introduction to the standards and their background   
- Scope and applicability   
- Functional safety and IEC 61508 / 61511 interpretation   
- IEC 61508 / 61511 basic principles refresher   
- The concept and importance of SIL determination   
- Risk concepts and criteria, risk aversion, tolerability including an exercise   
- Hazard identification, assessing frequency and consequence, modification list including an Example
- Risk graph approach with practical exercises
- LOPA use with exercise examples   
- Fault trees and demand trees using further practical exercises   
- The impact of humans in the equation and sources of fault tree data
- Dependency demands, layers etc. including a short exercise
- The ‘pros and cons’ of the differing approaches to SIL determination   
- Introduction to the CASS scheme



Wednesday, 23rd May 2018 - 09:30 til 17:00

Thursday, 24th May 2018 - 08:30 til 16:00

We have reserved a limited number of hotel rooms at a preferential rate for bed & breakfast. Details will be included with your confirmation.

  • When

  • Wednesday, 23 May, 2018 - Thursday, 24 May, 2018
    10:00 AM - 4:00 PM

  • Where

  • ABB Offices
    Daresbury Park
    Warrington WA4 4BT
    +44 (0) 1925 741111