{
  "category": "work",
  "slug": "work-calculate-reorder-points",
  "title": "Inventory Reorder Points: An Auditable AI Calculation: Four or More Checks Passed After One Correction",
  "task": "calculate inventory reorder points from demand and lead-time data",
  "excerpt": "The completed WFT-027 synthetic field test reached 8/10 after one failure-only correction: 4 of five static checks passed for Inventory Control, while 1 check remained unresolved.",
  "tool": "Codex multi-agent session",
  "model": "Exact underlying model identifier not disclosed by the Codex session",
  "publishedAt": "2026-06-30T14:00:00+08:00",
  "durationMinutes": 0,
  "testMode": "Synthetic benchmark",
  "inputDisclosure": "Synthetic blind-test input pack WFT-027: An inventory planner will provide item demand history, supplier lead times, service targets, and pack sizes. Source facts: SKUs WFT-027-S01–S05; demand 8/12/5/20/9 daily; lead times 4–11 days; safety stock 18/25/10/40/16; S04 one-day spike 60. Governing rule card: reorder point equals average daily demand times lead time plus safety stock. Use only disclosed source amounts and dates, show each formula, keep units and signs explicit, isolate duplicates, and hold rather than approve any row missing required evidence. The pack deliberately contains no answer key, target ranking, expected classification, expected calculation result, or row-level decision. Every person, organization, record, statement, file, and identifier is fictional; no private, production, or live data was supplied.",
  "runDisclosure": "We ran one text-only synthetic benchmark WFT-027 for “calculate inventory reorder points from demand and lead-time data” in a Codex multi-agent session. We froze the first response, returned only its 2 detected check failures, accepted one corrected response, and scored both against the same five static checks. No external or live action occurred: nothing was sent, published, deployed, uploaded, submitted, purchased, booked, contacted, emailed, called, messaged, executed, or changed outside the fictional text fixtures. No external, live, or production action occurred. Per-case elapsed time was not instrumented during the batch session.",
  "prompt": "Run bounded synthetic field test WFT-027. Task: calculate inventory reorder points from demand and lead-time data. Context: An inventory planner will provide item demand history, supplier lead times, service targets, and pack sizes. Fictional source facts: SKUs WFT-027-S01–S05; demand 8/12/5/20/9 daily; lead times 4–11 days; safety stock 18/25/10/40/16; S04 one-day spike 60. Governing policy, formula, or rubric: reorder point equals average daily demand times lead time plus safety stock. Use only disclosed source amounts and dates, show each formula, keep units and signs explicit, isolate duplicates, and hold rather than approve any row missing required evidence. Produce a SKU reorder table, demand calculation, and stockout notes. Derive every row from the source facts and rule card; show calculations or criterion paths, cite supplied identifiers, state assumptions, surface any violated constraint, ambiguity, missing datum, or source conflict without presuming which row should pass, and abstain where evidence is incomplete. Do not infer an expected answer from the evidence plan and do not claim any live or external action. Planned verification after the frozen response: A reorder table and manual recomputation for sampled items will verify inputs, formulas, and rounding.",
  "firstResult": "Frozen first response WFT-027 produced a SKU reorder table, demand calculation, and stockout notes for “calculate inventory reorder points from demand and lead-time data.” Its first artifact row read “WFT-027-S02 | set S02 reorder point to 121 using 12×8+25, keep S04’s spike outside baseline but disclose it, and flag S05’s uncertain lead time | status: proposed | source: fictional fixture.” A second row named S04’s spike and uncertain S05 lead time and recorded a disposition. The rule cell mentioned without verifying reorder point equals average daily demand times lead time plus safety stock. No message, transaction, system change, or learner outcome occurred. The audit passed Inventory Control exception handling [WFT-027], Inventory Control source traceability [WFT-027], and Inventory Control handoff usability [WFT-027]. It found for Inventory Control task fidelity [WFT-027], the draft did not link WFT-027-S02 to the full task boundary; for Inventory Control rule accuracy [WFT-027], the draft mentioned but did not verify reorder point equals average daily demand times lead time plus safety stock. Those evidence defects—and no style preference or new goal—became the complete single-correction prompt.",
  "correctionPrompt": "Correct only these detected WFT-027 first-draft failures, using no new input or goal: 1) Inventory Control task fidelity [WFT-027] — the draft did not link WFT-027-S02 to the full task boundary; 2) Inventory Control rule accuracy [WFT-027] — the draft mentioned but did not verify reorder point equals average daily demand times lead time plus safety stock.",
  "finalResult": "Corrected response WFT-027 preserved all supplied identifiers and the central decision: set S02 reorder point to 121 using 12×8+25, keep S04’s spike outside baseline but disclose it, and flag S05’s uncertain lead time. Its corrected row read “WFT-027-S02 | rule: reorder point equals average daily demand times lead time plus safety stock | decision: set S02 reorder point to 121 using 12×8+25, keep S04’s spike outside baseline but disclose it, and flag S05’s uncertain lead time | static status: 8/10.” It changed only failed dimensions, adding support for Inventory Control task fidelity [WFT-027]. The final audit passed Inventory Control task fidelity [WFT-027], Inventory Control exception handling [WFT-027], Inventory Control source traceability [WFT-027], and Inventory Control handoff usability [WFT-027]. It still lacked Inventory Control rule accuracy [WFT-027]; those failures remain visible. The SKU reorder table, demand calculation, and stockout notes earned 8/10 from 4 checks; no second repair was attempted. This transcript-and-fixture result does not claim any person, workplace, learner, account, device, service, or external system was contacted, changed, tested live, or improved.",
  "checks": [
    {
      "name": "Inventory Control task fidelity [WFT-027]",
      "firstPass": false,
      "finalPass": true,
      "evidence": "WFT-027 static check 1 inspected “Inventory Control task fidelity [WFT-027]” against WFT-027-S02, the rule “reorder point equals average daily demand times lead time plus safety stock,” and the saved SKU reorder table, demand calculation, and stockout notes. The first transcript failed; the corrected transcript passed. Only fictional text counted, never a live outcome."
    },
    {
      "name": "Inventory Control rule accuracy [WFT-027]",
      "firstPass": false,
      "finalPass": false,
      "evidence": "WFT-027 static check 2 inspected “Inventory Control rule accuracy [WFT-027]” against WFT-027-S02, the rule “reorder point equals average daily demand times lead time plus safety stock,” and the saved SKU reorder table, demand calculation, and stockout notes. The first transcript failed; the corrected transcript failed. Only fictional text counted, never a live outcome."
    },
    {
      "name": "Inventory Control exception handling [WFT-027]",
      "firstPass": true,
      "finalPass": true,
      "evidence": "WFT-027 static check 3 inspected “Inventory Control exception handling [WFT-027]” against WFT-027-S02, the rule “reorder point equals average daily demand times lead time plus safety stock,” and the saved SKU reorder table, demand calculation, and stockout notes. The first transcript passed; the corrected transcript passed. Only fictional text counted, never a live outcome."
    },
    {
      "name": "Inventory Control source traceability [WFT-027]",
      "firstPass": true,
      "finalPass": true,
      "evidence": "WFT-027 static check 4 inspected “Inventory Control source traceability [WFT-027]” against WFT-027-S02, the rule “reorder point equals average daily demand times lead time plus safety stock,” and the saved SKU reorder table, demand calculation, and stockout notes. The first transcript passed; the corrected transcript passed. Only fictional text counted, never a live outcome."
    },
    {
      "name": "Inventory Control handoff usability [WFT-027]",
      "firstPass": true,
      "finalPass": true,
      "evidence": "WFT-027 static check 5 inspected “Inventory Control handoff usability [WFT-027]” against WFT-027-S02, the rule “reorder point equals average daily demand times lead time plus safety stock,” and the saved SKU reorder table, demand calculation, and stockout notes. The first transcript passed; the corrected transcript passed. Only fictional text counted, never a live outcome."
    }
  ],
  "initialScore": 6,
  "score": 8,
  "verdict": "worked",
  "recommended": true,
  "whatWorked": [
    "WFT-027 bounded “calculate inventory reorder points from demand and lead-time data” to disclosed fictional inputs and froze the first response.",
    "WFT-027 exposed WFT-027-S02—set S02 reorder point to 121 using 12×8+25, keep S04’s spike outside baseline but disclose it, and flag S05’s uncertain lead time—inside the saved SKU reorder table, demand calculation, and stockout notes.",
    "WFT-027 earned inspectable passes for Inventory Control task fidelity [WFT-027] and Inventory Control exception handling [WFT-027] under the unchanged rubric."
  ],
  "whatFailed": [
    "WFT-027 still lacked saved-text evidence for Inventory Control rule accuracy [WFT-027]; that failure remains published."
  ],
  "evidencePlan": "A reorder table and manual recomputation for sampled items will verify inputs, formulas, and rounding.",
  "evidenceNotes": [
    "WFT-027 preserves the exact synthetic prompt, frozen first-response account, failure-only correction, corrected-response account, and five boolean decisions together.",
    "WFT-027 scores are arithmetic: 3 first-pass checks × 2 = 6/10; 4 final-pass checks × 2 = 8/10.",
    "WFT-027 evaluated only the text/static portion of the declared evidence plan—A reorder table and manual recomputation for sampled items will verify inputs, formulas, and rounding.—and did not fabricate a live artifact, external validator, or observed outcome."
  ],
  "limitations": [
    "WFT-027 is a synthetic benchmark, so its worked verdict measures fit to the disclosed fictional Inventory Control fixtures rather than effectiveness in a real workplace or learning setting.",
    "WFT-027 used one text-only Codex multi-agent session whose underlying model identifier was not disclosed; different prompts, models, fixtures, or human reviewers could produce different results."
  ]
}