{
  "title": "Car wash cycle and water measurement records for AI",
  "source_page": "https://fiund.com/industries/car-wash-water-basis-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Fresh intake and reclaimed circulation do not describe the same quantity",
    "context": "Simulated cumulative meter logs describe two overlapping practice cycles. No operating wash, customer vehicle or actual water-use claim is involved.",
    "records": [
      [
        "CWV1",
        "Cycle timing",
        "C1 runs seconds 0–10; C2 runs 5–12. No cycle-isolated readings supplied."
      ],
      [
        "CWV2",
        "Fresh-intake meter F",
        "At second 0: 100 practice volume units; at second 12: 109. Meter covers both cycles' shared window."
      ],
      [
        "CWV3",
        "Reclaimed-flow meter R",
        "At second 0: 200; at second 12: 206. Definition says circulating reclaimed flow, not additional fresh intake."
      ]
    ],
    "question": "What fresh-intake difference is documented, and can the two meter differences establish 15 units of fresh consumption or an exact C1 quantity?",
    "answer": "CWV2 documents a fresh-intake difference of 109−100=9 units over seconds 0–12. CWV3 separately documents six units of reclaimed circulation, not six additional units of fresh intake. Their sum is therefore not a fresh-consumption measure. Because CWV1's cycles overlap within the shared meter window, the packet also does not allocate an exact fresh quantity to C1 or C2 individually.",
    "failureModes": [
      "Adding circulating reclaimed flow to fresh intake and labeling the result fresh consumption.",
      "Assigning a shared-window reading to one overlapping cycle or splitting it equally without allocation evidence."
    ],
    "fields": [
      [
        "Meter identity and quantity definition",
        "Separates fresh intake from circulating flow."
      ],
      [
        "Read timestamps and cumulative values",
        "Makes the differences reproducible."
      ],
      [
        "Cycle boundaries and overlap",
        "Shows why per-cycle allocation remains unresolved."
      ]
    ],
    "holdout": "Provide a separate fresh meter for C1 only with synchronized start/end readings. Require its result to remain distinct from the original shared-window total.",
    "boundary": "Use original simulated logs or an approved closed training setup. Exclude plates, customers, payments, access details and people near operating equipment."
  }
}