Initiating Events can be added by clicking on the required Hazard ->SIL Determination -> LOPA -> Initiating Events.
An initiating event is a potential cause of the specified Hazard, which ultimately can cause a demand on the SIF for which the SIL Target is being set.
The Add Initiating Event window allows the selection of a default Initiating Events or to create a new Initiating Event altogether. The defaults are provided as a guide and can be modified in each use depending on the study.
Tip – Use the Used Text Function to use previous text used in that field within any Initiating Event in the project.
When setting a Target Frequency you can select the time unit, which converts the frequency to “per years”.
When selecting “Operator failure” (Human Error) from the defaults a Probability Of Error field is shown.
IPLs and Conditional Modifiers
Please read our guide on IPLs & Conditional Modifiers