| Field | Value | Definition |
|---|---|---|
| Product / Producto | K01 | One fictional item / Un artículo ficticio |
| Recorded units / Registradas | 20 | Reference ledger / Registro referencia |
| Reserved units / Reservadas | 6 | Included in 20 / Incluidas en 20 |
| Held units / Retenidas | 2 | Included in 20; separate from reserved / Incluidas en 20; distintas de reservadas |
| Requested units / Solicitadas | 15 | Not accepted order / No pedido aceptado |
| Supplier A / Proveedor A | 10 available; minimum 5 | Declared only; lead unknown / Solo declarado; plazo desconocido |
| Supplier B / Proveedor B | 8 available; minimum 10 | Contradiction needs review / Contradicción por revisar |
| Supplier C / Proveedor C | Availability unknown; minimum 1 | Reference lead 2 days, not confirmed / Plazo referencia 2 días, no confirmado |
1. Define units and states before subtraction
FIP records 20K01units. Six reserved and two held units are included in 20 and are separate groups. Reference availability is 20−6−2=12, not verified current commercial availability. Never subtract reservations again if already excluded: source definitions matter.
A 15 unit request is not an accepted order.15−12=3 is a reference gap, not an automatic replenishment order. Real quality, location, cutoff time and synchronization are unknown. The case table is the only exercise source.
Activity: define recorded, reserved, held, reference available and requested. State units, relationships and evidence. Calculate availability and gap without deciding to buy.
Worked feedback
Feedback:12 reference available, gap 3. Recorded 20 does not mean 20 free. Held means neither available nor proven permanent loss; invent no cause. No sale, actual reservation or delivery commitment is confirmed.
2. Review supplier information without selecting by appearance
Adeclares 10 available, minimum 5, no lead time. Bdeclares 8 but minimum 10; the sheet cannot establish fulfillment. Chas unknown availability, minimum 1 and a reference 2 day lead, not confirmed. No prices, names, contacts or contractual terms are supplied.
Separate data consistency from suitability. Gap 3 alone does not meet Aminimum 5, but creates no obligation to purchase 5 or hold surplus. Acommercial minimum is not stock evidence. Select no supplier from incomplete data.
Activity: record declarations, missing evidence, contradictions and questions for authorized review. Keep price, quality, timing and buying authority unresolved. Prepare no order and contact nobody.
Worked feedback
Feedback: Aneeds lead-time and minimum relevance clarification; Bneeds reconciliation of 8 available/min 10; Cneeds stock and timing verification. Two reference days establish no promised date. All remain subject to review, not supplier ranking or purchasing advice.
3. Reconcile discrepancies and preserve versions
Complete V1changes physical count to 18 instead of 20; reserved 6 and held 2 stay fixed. Ledger 20 minuscount 18 is a 2 unit discrepancy to investigate. Reference available 18−6−2=10, gap 15−10=5. Infer no loss, theft or sale.
Separate complete V2keeps ledger 20, changes reserved to 8, held 2, request 15. Available 10, gap 5. Never combine V1/V2: they are independent tests. Combining would produce 8 available/gap 7 from an unsupplied source.
Activity: keep base, V1, V2separate and record source, version, difference, pending item and next check. Design an overlapping reserved/held case and explain why clarification is required.
Worked feedback
Feedback: base 12/gap 3;V1andV2each 10/gap 5. Divergent counts require source review, not blind adjustment. Overlapping states risk double subtraction; stop until overlap is known. No actual inventory changes.
4. Deliver a reversible review procedure
A local procedure can follow source→validate units/states→calculate reference→review discrepancy→propose human clarification. A checked box proves no purchase or receipt. Operational permissions, current sources and concurrency need authorized integration, not implemented here.
Prepare five tests: base, count difference, reservation change, overlapping states and contradictory supplier data. Record expected, observed and limits. Preserve unknowns instead of turning declared availability into received goods.
Activity: deliver dictionary, supplier matrix, variant reconciliation, checklist and human-review note. Propose a local clarification draft without an actual recipient. Approve no purchases, payments or orders.
Worked feedback
Feedback: self-review four aspects 0–2: source/states, calculation/variants, data/permissions, reasoning/limits. No approved PRO threshold, completion, statement or benefit. This checks a fictional example, not a real warehouse or complete PRO curriculum.