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Introduction
Layers of Protection Analysis (LOPA) is the latest
methodology for hazard evaluation and risk assessment.
The LOPA methodology lies between the qualitative
methods (such as HAZOP and What-if) and quantitative
methods (using Fault Trees and Event Trees).
Layers of Protection Analysis (LOPA), a semi-quantitative
risk assessment technique, provides a simple and
effective methodology to perform Safety Integrity
Level (SIL) analysis for a process. LOPA is based on
the safety protection layer concept.
The first (innermost) level of protection is built-in
and is the inherent nature of the process; the final
(outermost) level of protection is the emergency
response action from the community. The prevention or
mitigation of hazardous events depends on the
availability and successful performance of various
safety protection layers. In case of failure of one
protection layer, the protection layer at the next level
will still be available to take the process to a safety
state. As the number of protection layers and their
reliabilities increase, the safety of the process
increases.
LOPA makes it feasible to comply with performance-based
standards effectively and with limited resources.
Our Services
We can provide the following LOPA services.
- Facilitate LOPA for new projects
- Develop LOPA Procedures
- Conduct LOPA Training
- Provide LOPA Software
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