Acronyms & Terms Glossary

Layers Of Protection Analysis (LOPA)

Layers of Protection Analysis (LOPA) is a semi quantitative method of risk assessment analyzing the frequency of occurrence of events that can produce a hazard associated with handling of hazardous chemicals. LOPA considers the applicability of safeguards, the potential for individual layers of protection to fail, and the potential consequences that are consistent with the organization's risk tolerance.

During LOPA, Independent Protection Layers (IPLs) are identified. Claiming credit for one or more IPLs that do not provide the protection claimed will result in under-designed SIFs, increasing risk to the facility. Claiming less credit for IPLs than is actually provided will result in over-designed SIFs, increasing capital cost. aeSolutions has the expertise and experience to help you perform this critical task most effectively.