See how a running total differs from a rate of change using daily parcels as an...

https://foxtrot-wiki.win/index.php/How_Do_Step_Functions_Relate_to_Real_Transaction_Histories%3F

See how a running total differs from a rate of change using daily parcels as an example. A total counts packages delivered so far, while a rate shows parcels per hour or day. Clear time windows and units make shipping charts easier to read.