Control chart

{
  "id": "MLC-T-CHM-002520",
  "term": "Control chart",
  "field": "Chemistry",
  "definition": "A graph used to monitor how a process changes over time by plotting data points in a time-ordered sequence. The chart includes a central line for the average, an upper line for the upper control limit, and a lower line for the lower control limit. These limits are statistically determined from historical data and are distinct from specification limits, which are determined by client or engineering requirements.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Shewhart means chart",
    "Shewhart range chart",
    "control limit",
    "cumulative sum control chart",
    "internal quality control",
    "measurement procedure"
  ],
  "references": [
    "PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1023 (https://doi.org/10.1515/pac-2019-0819)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/control-chart/"
}