TP,
Per Arnoud's suggestion; if you have access to Performance Analytics you can accomplish this by setting up a bucket group for the three 8 hour shifts. There is an OOTB example using hour of day under Performance Analytics > Bucket Groups you can use for reference. You will need to create a similar bucket modifying the start and end times to match your 3 shifts.
To accomplish this you will need to do the following:
1. Create a Bucket group for the 3 shifts
2. Create a Breakdown Source for the shifts and associate it to the bucket group
3. Create an Automated Breakdown for the shifts and associated it to the Breakdown Source.
a. On the breakdown mappings tab, you will need to associate the table and field you want use as the qualifier. In my example, I used opened_at for incident.
b. On the indicator tab, you will need to associate the indicator (Number of Open Incidents) you want to apply this breakdown to.
4. Create or Re-run a job including the indicator with the new breakdown.
