Layer of Protection Analysis

Layer of Protection Analysis (LOPA) is the newest methodology for hazard evaluation and risk assessment. The LOPA methodology lies between the qualitative end of the scale (characterized by methods such as HAZOP and What-if) and the quantitative end (characterized by methods using Fault Trees and Event Trees). LOPA helps your company make consistent decisions on the adequacy of the existing or proposed layer of protection against an accident scenario. The decision making process is ideally suited for coupling with a company's risk-decision criteria.

LOPA can help you:

• Focus resources on high-risk scenarios
  
• Prioritize recommendations
  
• Reduce low recommendation that have been along for a long time
  
• Determine if a Safety Instrumented Systems (SIS) is necessary
  
• Determine the Safety Integrity Level (SIL) of an SIS
  

How RRS can help you:

• Facilitate LOPA for new projects
  
• Facilitate revalidation of PHAs
  
• Develop LOPA procedures
  
• Conduct LOPA training
  
• Provide LOPA Tool® software for documenting your studies