Layers of Protection Analysis (LOPA)

Duration: 3 days

Course Aim

This course is designed for practitioners and those who either participate in a facilitated layer of protection analysis (LOPA) or want a better understanding. It covers all facets of performing LOPA. It lays the foundation with basic probability math, event tree analysis, and topics on human error and common mode failure. The transition to LOPA from a basic HAZOP is covered, considering the impact of corporate risk criteria. Initiating causes, enabling events, independent layers of protection, and conditional modifiers are all covered. To drive the methodology home, hands-on workshops are conducted.

Course Objectives

At the end of the course, the trainee will be able to:

  • Understand the LOPA methodology and its application
  • Explain how to decide if a process needs a safety instrumented system (SIS)
  • Understand what safety integrity level (SIL) is required
  • Define an Independent Protection Layer (IPL)
  • Implement a process to manage these systems through the life cycle of an installation
  • Demonstrate how to lead a LOPA study

Course Content

  • Risk Criteria
  • Probability Math and Logic Models HAZID to LOPA
  • Human Error
  • Data Considerations
  • Common Mode Failure
  • Initiating Events
  • Independent Layers of Protection Alarm Layer of Protection
  • Enabling Conditions
  • Conditional Modifiers
  • Safety Integrity Level Selection


Who Should Attend?

Process Safety Engineers, Process Control Engineers, SIS Engineers, and Reliability Engineers.