Layer of Protection Analysis (LOPA) - October 2018

Date From: 23 October 2018
Date To: 24 October 2018
Location: United Kingdom
Description: Covers the basic methodology of LOPA and the detailed stages of its application. Participants are shown how to identify significant scenarios, estimate frequencies for the worst-case events and how to assign risk categories.
Event Type: IChemE Course
Venue: IChemE, Rugby, UK
Organiser: IChemE
Contact Name: Courses department
Contact Phone: +44 (0)1788 534496
Contact Email:

This course is now full.  If you are interested in this date please contact to be added to a waiting list

Alternative dates

4-5 December 2018, Rugby, UK
12-13 March 2019, Rugby, UK
7-8 May 2019, Rugby, UK


Learn the latest process risk assessment technique for process control

Layer of protection analysis (LOPA) is a semi-quantitative tool for analysing and assessing risk on a process plant. It uses an order of magnitude technique to evaluate the adequacy of existing or proposed layers of protection against known hazards.

This course covers the basic methodology of LOPA and the detailed stages of its application. Participants are shown how significant scenarios are identified and how frequencies are estimated for the worst-case events. All the essential steps in this method are practised in workshops, including the use of software tools in LOPA.

Learning outcomes

  • the basic methodology of LOPA
  • how to decide if a process needs a safety instrumented system (SIS)
  • what safety integrity level (SIL) it needs
  • how to define an independent protection layer (IPL)
  • how to implement a process to manage these systems through the life cycle of an installation
  • how to lead a LOPA study

Who will benefit

  • production engineers
  • process design engineers
  • project engineers
  • process programmers and instrument control designers

Course outline

  • LOPA methodology, other methods, matrices and charts
  • what do the competent authorities expect?
  • severity estimation and targets
  • initiating events and frequencies
  • conditional modifiers
  • independent protection layers
  • other safety-related protection systems
  • 'aggregation' of scenario frequency when there is more than one initiator
  • addressing ALARP
  • uncertainties and sensitivities
  • documentation
  • cautions on using LOPA
  • when LOPA is done – managing/operating a safety instrumented system


IChemE member: £1350 + VAT
Non-member: £1480 + VAT

11.5 hours CPDDuration for CPD recording purposes: up to 11.5 hours

If you are recording mandatory CPD you should refer to your own regulator’s requirements as recognition of CPD hours may vary.

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IChemE is a registered charity in England & Wales (214379), and a charity registered in Scotland (SC 039661).