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.This course covers the  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.

Course Content

  • History and Alignment with the Bowtie
  • Overview of technique
  • Scenarios, credibility and connection to HAZOP
  • Initiating Events
  • IPLs
  • Modifiers
  • Using LOPA with ALARP & SFAIRP including cost/ benefit analysis
  • Good practice
  • Learning workshop and stand alone workshops to test learnings


All attendee’s will receive a free LOPA tool which is aligned with best practice methodology and reporting

Course Duration: 2 days

Maximum number of attendees: 15

Click here to inquire about this course as an in-house event at your site.

Other useful links

      • Introduction to Process Safety E-Learning read more
      • Introduction to Process Safety Video read more
      • HAZOP Leaders Training read more
      • Process Safety Learning Management System read more