Layer of Protection Analysis (LOPA)

Layer of Protection Analysis (LOPA) is a simplified quantitative tool for assessing risk of scenarios already identified. HAZOP studies often yield a number of scenarios that need further elaboration in order to demonstrate achieving the target risk. LOPA, being the industry standard, is an easy-to-understand tool to identify, assess, challenge and document existing risk reduction conditions and safeguards. It shows whether risk targets are met or exceeded and provides a rational allocation of equipment and personnel.

This 1-day LOPA course is a logical add-on to the 3-day HAZOP course, but can also be attended as a stand-alone module.

  • Concept of Multiple Protection Layers
  • What is LOPA – Comparison with other risk analysis methods
  • Purpose and benefits of LOPA
  • Options for Risk Reduction – relation to Risk Acceptance Criteria
  • Developing scenarios, severity and linking to the risk criteria
  • Identifying Initiating Events and Enabling Conditions
  • Determination of Initiating Event Frequency
  • Conditional Modifiers
  • Identifying Independent Protection Layers – Requirements for IPLs
  • Determining the Frequency of Scenarios
  • Determining scenario risk acceptance and/or further measures needed
  • Implementation of LOPA in your organisation