olemus
ISO/IEC/IEEE 24765:
protsessiandmete graafiline esitus ajas ja kehtestatud kontrollpiiride suhtes, millel on keskjoon, mis aitab tuvastada esitatud väärtuste tendentsi kummagi kontrollpiiri suunas
= a graphic display of process data over time and against established control limits, which has a centerline that assists in detecting a trend of plotted values toward either control limit

ülevaateid
https://asq.org/quality-resources/control-chart
https://en.wikipedia.org/wiki/Control_chart
https://balancedscorecard.org/wp-content/uploads/pdfs/control.pdf