Shewhart range chart

{
  "id": "MLC-T-CHM-010818",
  "term": "Shewhart range chart",
  "field": "Chemistry",
  "definition": "A type of Shewhart control chart that monitors the variability or dispersion of a process by plotting the ranges of subgroups of measurements over time. This chart displays the difference between the maximum and minimum values within each subgroup. It includes a central line representing the average range and upper and lower control limits, typically set at three standard deviations from the average range.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Shewhart control chart",
    "analytical run"
  ],
  "references": [
    "PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1041 (https://doi.org/10.1515/pac-2019-0819)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/shewhart-range-chart/"
}