Challenge
The client had recently completed a Hazard and Operability (HAZOP) study that identified 19 hazardous scenarios with high residual risk. These scenarios posed potential threats to personnel safety, including exposure to hazardous chemicals, equipment failure, and process deviations. The client needed a deeper analysis to determine whether additional safety measures, particularly Safety Instrumented Functions (SIFs), were required to reduce risks to acceptable levels.
Our Approach
Finch Consulting facilitated a Layer of Protection Analysis (LOPA) workshop across two sessions, involving a multidisciplinary team from the client’s engineering, operations, and safety departments. The sessions were conducted remotely via Microsoft Teams, ensuring accessibility and collaboration across locations.
Our consultants:
- Reviewed the HAZOP findings and selected scenarios for LOPA assessment.
- Applied industry standards (IEC 61508 and IEC 61511) to guide the methodology.
- Evaluated initiating event frequencies, independent protection layers (IPLs), and conditional modifiers.
- Calculated required Safety Integrity Levels (SILs) for each scenario.
- Documented all findings in a structured LOPA worksheet for transparency and traceability.