Metrics

NFORS Metrics

On this page you will find the definitions of the common statisitical metrics presented on your respective dashboards.

Mean Value

The arithemetic mean value or more commonly called an 'average' is the central value of a set of points: the sum of the values divided by the number of values.

90th Percentile

The 90th percentile is a measure that tells you the value for which 90% of the points are smaller and 10% of the data points are larger.

Median

The median value represents the value for which 50% of the points are smaller and 50% of the points are larger. In other words, th middle value.

Percent Change

The percent change represents the relative change compared to a baseline value.

Percentile Ranks

Percentile ranks show the percentage of observed values which are below a certain value.

For example, you may have a performance goal of first arriving apparatus having a travel time of 4 minutes or less. The rank value in this example would be 4 (the number of minutes) and the result would be the percentage of incidents that had a 4 minute travel time or less.