Layer Of Protection Analysis can be used to quantify the likelihood of a hazardous event occurring. All credible initiating events, independent protection layers and operating conditions are taken into account.
In order to optimise the cost effectiveness of the Safety Instrumented Functions (SIFs) used to manage hazards within a process, the target SILs must be determined.
xSeriCon is highly experienced in SIL Determination using a range of methods including Layer Of Protection Analysis (LOPA) and Risk Graph.
The design of a Safety Instrumented Function (SIF) must be verified to see if it actually meets the requirements of its corresponding Safety Integrity Level (SIL). This involves calculation of the probability of failure, assessment of fault tolerance, and confirmation of systematic capability. It can also yield optimised proof test intervals and recommendations on how to achieve the requirements if they are not met.
To meet project demands xSeriCon has developed our own SIL Verification Software, SILability™.
Fault Tree Analysis (FTA) is a calculation of the expected frequency of an unwanted event that can arise from multiple root causes. Calculations are simple but finding the combinations of root causes and protective measures is often very challenging.
Numerous clients have benefited from xSeriCon's experience in guiding workshop teams to a valid solution.
Event Tree Analysis can be used to study cases where there are multiple consequences of interest. In these cases risk integrals can be utilised to evaluate the total risk of scenarios with multiple risk outcomes.
In the event that the risk of a hazard falls within the ALARP region of the designated risk matrix, the risk owner must provide justification for acceptance of the residual risk. ALARP justification develops a documented rationale for this risk tolerance, providing valuable input for future risk management activities including Management Of Change (MOC).