XmR

a statistical process control chart (graph) - see (2023-02-06) Chin How To Become Data Driven; XmR-it is a free tool to use instead of spreadsheet: https://xmrit.com/

how-to: (2024-08-28) Xmrit Course

what if there's a trend? see "XmR Trend Chart" - XmR-it is putting that into beta soon (as of Jan'2025)