{
  "caseId": "complaint-chart-choice",
  "nature": "fictional-teaching-example",
  "period": "2026-09 fictional month",
  "population": "100 valid complaints; one main issue assigned once to each complaint",
  "unit": "complaints",
  "categories": {
    "Stockouts": 45,
    "Late delivery": 30,
    "Packaging": 15,
    "Other": 10
  },
  "classification": "mutually exclusive and exhaustive by fictional construction",
  "causesVerified": false
}