{
  "chartTypeId": "ewma",
  "columnRef": {
    "instanceId": "__source__",
    "sheetId": "sheet-spc-drift",
    "columnId": "c-wert"
  },
  "lambda": 0.2,
  "L": 3,
  "sourceWorksheetFile": "worksheets/spc-time-weighted-drift.json"
}