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Operational EDI reference

ASN Quantity Mismatch: Compare 850 PO1 and 856 SN1

Aggregate item quantities by qualified identifier and block shipped quantities that disagree with the purchase order.

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Direct answer

Direct answer

ASN quantity reconciliation pairs each 850 PO1 item with the corresponding 856 LIN item and compares ordered quantity with aggregated SN1 shipped quantity. Qualifiers matter: a buyer item number and vendor item number are not interchangeable without a cross-reference. Repeated shipment lines must be summed before comparison. Partial shipment policies remain partner-specific, so the gate should distinguish deterministic differences from approved business exceptions.

Why a parser is not enough

The useful unit is not a file that parses; it is a business document with a known decision, an owner, a source trail and a matched downstream response. This page connects the technical structure to that operating workflow.

What the control should check

  1. 01Normalize supported item qualifier-value pairs.
  2. 02Aggregate repeated PO1 and LIN/SN1 lines.
  3. 03Compare quantities using documented precision.
  4. 04Block unapproved missing or different quantities.
  5. 05Treat partial-shipment allowances as explicit policy, not an assumption.

Working example

PO1 BP SKU-104 / 12 EA ↔ LIN BP SKU-104 / SN1 10 EA → QUANTITY_MISMATCH

The excerpt is intentionally compact. Use the working validator or authenticated gateway with the complete interchange to obtain a decision.

Failure modes worth catching

  • A transport receipt is mistaken for business acceptance.
  • Control identifiers are regenerated between validation and submission.
  • A warning has no owner and becomes a recurring manual investigation.
  • The document is checked alone even though the truth exists in a purchase order, label or acknowledgement.

Put it into the dispatch workflow

  1. 1Validate the source document before transport.
  2. 2Block deterministic failures and assign every review item.
  3. 3Release with a recorded owner and timestamp.
  4. 4Match functional and application acknowledgements.
  5. 5Reconcile confirmed outcomes back into fixtures and rules.
Use batch validation and acknowledgement tracking

Questions

Implementation answers

Does Shipment Sentry replace my EDI provider?

No. It sits before the existing transport as a validation and evidence sidecar.

What does cleared mean?

The document has no blocking finding in the current rule pack. It is not a guarantee of trading-partner or receiving acceptance.

How are repeat requests kept safe?

The API requires an idempotency key, stores only a token hash, scopes every record to one workspace and rejects reuse with different content.

Sources and limits

Reviewed 2026-07-18. Public references cannot establish every partner-specific rule. Current implementation guides and agreements remain controlling.

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