Running totals and rates of change answer different questions: how much has...

https://www.phone-bookmarks.win/this-article-compares-running-totals-with-rates-of-change-through-parcel

Running totals and rates of change answer different questions: how much has accumulated, and how quickly is it changing? See how parcel counts over a shift or rainfall in an hour clarify the difference, with units and time windows in view.