ServiceDesk 7.5 - where does the global ReportProcessID originate in SD.IncidentManagementSimple

I'm trying to figure where the global ReportProcessID value (not variable) originates, in an attempt to understand how the values from the "Reporting" tab translate into the process ID.  Do the values/fields in the Reporting tab statically save to certain global values?  Anyways, screenshots attached.  Thanks!