See how a running total differs from a rate of change with parcels delivered as...

https://future-wiki.win/index.php/If_I_deposit_%C2%A310,_%C2%A315,_and_%C2%A320,_why_is_the_total_%C2%A345_but_my_balance_differs%3F

See how a running total differs from a rate of change with parcels delivered as an example. Track the total across a shift, then compare parcels per hour. The article shows how units and time windows help you read a chart and spot what’s changing.