This Presentation covers an overview of the key facets of performing layer of protection analysis (LOPA). It provides an understanding of the terminology, explains the transition from HAZOP to LOPA and lays the foundation for the basic probability math used by the methodology. Topics such as corporate risk criteria, human error, and common mode failure are addressed as they relate to LOPA.
Initiating events and frequencies
Probability of failure on demand
Initiating events rates
The LOPA process
LOPA and its linkages