Control limit

{
  "id": "MLC-T-CHM-002522",
  "term": "Control limit",
  "field": "Chemistry",
  "definition": "A boundary on a control chart, typically set at plus or minus three standard deviations from the central line, used to distinguish between common cause and special cause variation in a process. Data points falling outside these limits indicate that the process is out of statistical control. These limits are derived from the process data itself.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Shewhart control chart",
    "control chart",
    "process in a state of statistical control",
    "target measurement uncertainty"
  ],
  "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-limit/"
}