Running the risk calculations and viewing the results

When you have examined the consequence calculations, made any appropriate adjustment to the definitions of Scenarios or other input data and rerun the calculations, you can proceed to the risk calculations.

Running the calculations

To run the risk calculations for all of the Run Rows, take the following steps:

1.In the Home tab of the Ribbon Bar, set the Mode to Risk.

2.Expand the Run Row Selector pane, and select All Run Rows at the top of the list of Run Rows.

3.Click on Run in the Home tab of the Rubbon Bar.

The risk calculations will run very quickly.

You can only run the risk calculations from the Run Row Selector pane, i.e. when a Run Row or a set of Run Rows is selected. You cannot run risk calculations for an individual Scenario selected in the Models tab of the Study Tree. When you select a Scenario and use the Run option, the program will run only the consequence calculations for that Scenario and will not proceed to the risk calculations, even when the Mode is set to Risk.

The list of available risk results

When the risk calculations for a particular Run Row have been completed successfully, a green tick will appear next to the icon for that Run Row in the Run Row Selector. In addition, the Risk option will become enabled in the right-click menu for the Run Row, and you can expand this option to view a list of the type of risk results that are available. The Risk option is also available for the All Run Rows node at the top of the list.

The risk results are organised in three categories:

1.Societal Risk Results

These results present the risk in terms of the number of fatalities caused by the different alternative outcomes of the hazardous events, and the frequency of the outcomes. The FN Curves show the results in the form of a graph of the frequency F of outcomes that cause N or more fatalities. The other types of societal risk results are reports in the form of tables or grids that list the individual outcomes, and give different types of analysis of the results, with different levels of grouping and breakdown.

2.Risk Ranking Point Results

These results list all of the individual outcomes that contribute to the risk of exceeding vulnerability criteria at a given Risk Ranking Point. The different types of risk ranking point results give different types of analysis of the results, with different levels of grouping.

The risk ranking point results are not available in Safeti Lite.