The Reviewed Incidents, New Incidents and Escalated Incidents metrics are all based on the dashboard ‘history’ period. This is set by the HISTORY aggregation parameter.
The history period simply specifies a period in months, over which incidents are aggregated. For example, if the history period is three months, the Reviewed Incidents metric will show the number of incidents that were reviewed over the three months immediately prior to the most recent aggregation. (By default, aggregations run every hour.)
Note: Information about all aggregation parameters, and instructions for customizing aggregation schedules, can be found in reports.htm.
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