# Understand Metrics

Understand analysis results metrics

# Overview

Analysis results include various metrics that enable you to measure the projected risk to an exposure. Metrics include EP metrics, ELTs, PLTs, and statistics.

# EP metrics

The Exceedance Probability (EP) or stochastic analysis option runs a full probabilistic analysis on the exposure at risk, producing curves that are cumulative distributions showing the probability that losses will exceed a certain amount, from either single or multiple occurrences. These losses are expressed in the occurrence exceedance probability (OEP) and the aggregate exceedance probability (AEP) curves. AEP and OEP curves are two different curves that have two distinct uses and offer different information. Both curves show the probability that losses will exceed a given threshold.

The Get EP Mertrics resource returns the following metrics for each analysis result.

```
[
{
"id": 8,
"workflowId": 9064540,
"position": "GU",
"portfolioId": 8,
"variationId": 0,
"dimensions": [
""
],
"metricName": "AEP",
"metricValue": [
{
"id": 0,
"value": {
"returnPeriods": [
1.0,
2.0,
3.0,
4.0,
5.0,
...
50000.0
],
"positionValues": [
0.0,
0.0,
0.0,
0.0,
1.4336826286215238,
...
2898128.185059362,
2923391.5767636155
]
}
}
]
}
]
```

# Event loss tables

The event loss table (ELT) is an output table that contains information about the loss-causing events in an analysis, including the mean loss standard deviation (split into an independent and a correlated piece), exposure value, and event rate.

The ELT is the basis of losses for all financial perspectives at all exposure levels and is used in computing output statistics.

The Get ELT Metrics resources returns the following metrics for each analysis result.

```
[
{
"anlsid": 83343,
"id": 8,
"sourceid": 22267,
"eventid": 2865697,
"perspvalue": 3473657.880534969,
"perspcode": "GU",
"stddevi": 1066771.2741421806,
"stddevc": 400576.7724183246,
"expvalue": 4343900.0,
"rate": 1.2056769946866552e-6,
"status": 0,
"peril": "Windstorm",
"region": "North America",
"oepWUC": 1.205676267823641e-6
}
]
```

# Period loss tables

The period loss table (PLT) is an output table that simulates event losses over the course of a time period, providing greater flexibility to evaluate loss metrics than the analytical calculations based on event loss tables (ELTs).

By simulating events through time, a model computes total loss as well as maximum event occurrence loss for each simulation period in the table, and generates loss statistics based on the distribution of losses across the large number of simulated periods. This methodology can calculate the impact of all contract terms, including terms with time-based features, such as contracts that are shorter (or longer) than a single year.

The Get PLT Metrics by Result resources returns an array of PLT metrics for a specific analysis result.

```
[
{
"periodid": 503,
"weight": 2.0E-5,
"eventid": 3508644,
"eventdate": "2020-08-07T00:00:00.000Z",
"lossdate": "2020-08-13T00:00:00.000Z",
"perspvalue": 111642.35349968076,
"peril": {
"id": 0,
"code": "FL",
"name": ""
},
"region": {
"id": 0,
"code": "EU",
"name": ""
},
"exposureNumber": ""
},
...
{
...
}
]
```

# Statistics

Statistics include the average annual loss, standard deviation, and coefficient of variation.

The Get ELT Tables resources returns the following metrics for each analysis result.

```
{
"anlsid": 83343,
"id": 8,
"sourceid": 22267,
"eventid": 2865697,
"perspvalue": 3473657.880534969,
"perspcode": "GU",
"stddevi": 1066771.2741421806,
"stddevc": 400576.7724183246,
"expvalue": 4343900.0,
"rate": 1.2056769946866552e-6,
"status": 0,
"peril": "Windstorm",
"region": "North America",
"oepWUC": 1.205676267823641e-6
}
```

Updated 2 months ago