Process Management & Control

Webinar: Proof Testing of Safety Instrumented Functions

Webinar: Proof Testing of Safety Instrumented Functions
  • Date From 7th May 2021
  • Date To 7th May 2021
  • Price Free of charge, open to all.
  • Location Online: 09:00 BST. Duration: 1 hour.


A key part of any IEC 61511 or IEC 61508 Safety Integrity Level (SIL) Assessment is the Random Hardware Failures verification; does the Safety Instrument Function (SIF) meet its Probability of Failure on Demand (PFD). Achieving this is heavily dependent on the frequency at which a SIF (and its constituent elements) is PROOF TESTED. This means that if the proof testing strategy (frequency, coverage, management etc.) is flawed, risk targets may not be met, despite ‘what the numbers say’. Clearly a good understanding of the principles of proof testing is essential. This webinar will cover:

  • main concepts and definitions
  • overview of IEC 61511 requirements
  • proof testing principles
  • practical issues
  • resource implications
  • proof test procedures
  • worked examples.

This webinar is aimed at plant managers; engineers of various engineering disciplines; safety managers and technicians. 


David Green, Engineering Safety Consultants    

David is a Chartered Engineer (CEng), registered European Engineer (EUR ING), Registered Functional Safety Engineer (InstMC) with more than 18 years’ experience in safety-related applications. He is a certified TÜV Rheinland Functional Safety Expert (SIS - #277/17).

David has spent most of his career working in upper tier COMAH manufacturing sites, maintaining the instrumentation systems on the organisation’s behalf. 

The material presented in this webinar has not been peer-reviewed. Any opinions are the presenter’s own and do not necessarily represent those of IChemE or the Process Management and Control Special Interest Group. The information is given in good faith but without any liability on the part of IChemE.


09:00—10:00 BST


A one-hour online session: 40 minutes' presentation + 20 minutes' Q&A.


The presentation will be delivered via GoToWebinar®. 
Check system requirements.

You are advised to join the webinar at least ten minutes before the scheduled start time, to allow for your computer to connect.

Register to attend

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