Layer of Protection Analysis (LOPA) - New Zealand

Date From: 17 May 2016
Date To: 18 May 2016
Location: New Zealand
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: Hamilton, New Zealand
Organiser: IChemE
Contact Name: April Hinde
Contact Phone: +61 (0) 3 9642 4494
Contact Email:

Book Event

Download the Layer of Protection Analysis course brochure

Alternative dates and locations

20-21 June 2016, Perth, Australia


Learn the latest process risk assessment technique for process control

Layer of protection analysis (LOPA) is a semiquantitative 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. LOPA typically builds on the information developed during a qualitative hazard evaluation, such as a process hazard analysis (PHA), and can be used to meet the risk assessment requirements of IEC 61508 and 61511 standards.

This course covers basic and more advanced methodology of LOPA and the detailed stages of its application. Participants are shown how significant scenarios are categorised and tolerable frequencies assigned for identified hazardous events. They are shown how to assign risk categories and therefore determine the number of independent protection layers (IPLs) that should be in place. The specification and requirements for a protection layer to be accepted as an IPL are discussed. 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)
  • if yes, what safety integrity level (SIL) does it need?
  • how to define an independent protection layer (IPL)
  • how to implement a process to manage these systems through the life cycle of an installation

Who will benefit

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

Course outline

Day 1

  • history and methods
  • LOPA methodology, other methods,matrices and charts
  • what do the competent authorities expect?
  • scenarios
  • severity estimation and targets
  • initiating events and frequencies
  • conditional modifiers
  • independent protection layers

Day 2

  • other safety-related protection systems
  • 'aggregation' of scenario frequency when there is more than one initiator
  • example spreadsheet tools for study
  • addressing ALARP
  • uncertainties and sensitivities
  • documentation
  • cautions on using LOPA
  • when LOPA is done – managing/operating a safety instrumented system



IChemE member       NZD$2470 (inc GST)
Non member   NZD$2755 (inc GST)


Discounts are available to companies booking more than one place:

2 places – 5% discount
3 places – 10% discount
4 or more places – 15% discount

Multiple places must be booked at the same time to qualify.

Course presenters

Paul Feltoe, FIChemE, Director Safety Solutions
Paul Feltoe is a qualified Chemical Engineer with professional status in New Zealand and the United Kingdom. Paul has over 20 years of global experience in the Refining, Oil & Gas, Petrochemical and  Dairy Industries. He is an experienced facilitator and trainer and has chaired numerous large process safety reviews and worked with a number of large organisations to close their process safety gaps. He is a fellow of IChemE, a Professional Process Safety Engineer and a TÜV certified functional safety engineer.

Nick Diamond, Senior Consultant, Safety Solutions
Nick graduated from Leeds University, UK with an honours degree in electrical and electronic engineering and is a member of the IET. Nick has over 20 years of global experience in oil and gas, refining and petrochemical industries. He is an experienced safety system designer and a certified TÜV functional safety engineer. Nick spends his time facilitating hazard, risk & SIL reviews  in addition to consulting and engineering across the full IEC61511 lifecycle.

Duration (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.

IChemE member? Log your CPD via mycareerpath

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