Event Accumulation in 5.1 and Later

You can accumulate property exposures based on event footprints. AIR provides event footprints based on the perils and regions that you license. AIR events are categorized as Historical Events (real world events such as Hurricane Katrina or Northridge earthquake) or World Disaster Scenarios (such as Lloyds' disaster scenarios or extreme disaster scenarios). You can also import your own GIS layers that represent a single disaster event in the form of Events or World Scenarios data type using Map Layer Import. You can select multiple historical and World Disaster Scenarios events from any combination of AIR-provided layers or your custom imported layers.

If you import a map layer using Map Layer Import while configuring an event accumulation, you may have to close your project and reopen it for that layer to appear in the list of available layers on the Accumulate tab.

The Accumulate grid displays all the AIR data layers and all the layers that you have imported; depending on what you have licensed, the list can be long. To search for a specific layer, enter keywords in the Search box. You can also use the Filter button to search for layers by type, region, and peril. The Search text is combined with the selected filters using an "AND" Search operator. Example

For some events, depending on the type of peril, you may be able to add new accumulation ranges and remove accumulation ranges.

There are accumulation ranges for an event only if the event footprint has intensity information associated with it. For example, the RDS UK Flood event only outlines what is flooded; it does not indicate the depth of the water. The Charleston 1886 earthquake event footprint indicates the intensity of the ground movement (G).

This is where you are in the workflow for configuring the analysis:

Open Project > Select Exposure View > Under RunAnalysis, select Geospatial > Choose Analysis Type > Configure the analysis > Modify Settings and Reinsurance > Enter Analysis Name > Specify Result Database > Run analysis

To accumulate values by events:

1. Select Event Accumulation as the analysis type.

2. In the Step 2 - Configure pane, on the Accumulate tab, select one or more events in the grid.

3. Click to preview an event, one at a time, on your map.

Touchstone draws the selected layer on the map; the drawn layer remains until you preview a different event. If you use the Map Layers tool to add layers to the map, those layers remain on the map even when you preview a different event. Example

4. Click the ellipsis (...) to view information about an event.

Information for the highlighted event includes the event name, the peril associated with the event, the region, and the event year, and, for some events, accumulation ranges. Examples

5. Optionally, modify one or more accumulation ranges.

a. For historical events, depending on the type of peril, you may be able to add new accumulation ranges. To add a new accumulation range for an event, select the event, click ..., and then click Add New Range. In the new row, edit the default range data.

b. To remove an accumulation range, select the row, and then click .

c. To edit an accumulation range, select the event, open the description panel, and then click in each cell where you want to make a change.

The default damage percent is 100.00 for all range values. You should modify the damage percent for each value and each event that you select, based upon your own claims experience.

6. Optionally, select the Intersect tab and then, optionally, on the Hazard tab, select one or more hazard layers.

You can use the same Search, Filter, and Preview functions for the hazard layers that you use for events.

7. Optionally, select the Detailed Loss tab and then select a single set of results from the Detailed Loss grid.

The grid lists only those detailed loss results where the detailed loss analysis was run against the selected Property exposure target and where the Save By > Location was selected in the Output Options pane of the New Detailed Loss Analysis configuration pane. This function applies only to Property exposure analyses, not to Workers' Compensation analyses. This function is useful when you want to associate the analysis target with a single set of detailed loss results in order to evaluate the accumulation results with reference to average annual losses (AAL).

Touchstone 6.0 Updated September 03, 2020