Destructive Testing Samples Shipment Quantity: Reconcile Before Pack-Out

A destructive testing samples shipment quantity decision should be settled before pack-out, not guessed from the number of pieces selected for inspection. The buyer and supplier should reconcile the purchase-order quantity, completed units, units selected for tests, units that remain unchanged and released, units held or retained, units consumed or altered, and the quantity approved for shipment. Each physical unit must appear in one final state at the time of reconciliation so no unit is counted twice or silently treated as deliverable.

The procurement record should keep destructive testing samples shipment quantity distinct from the general inspection quantity because the former tracks units retained, consumed, or otherwise unavailable for shipment.

This is a procurement and record-control guide, not a test method, invoice rule, or universal allowance for damaged or consumed samples. A qualified inspection or laboratory provider determines its technical sampling requirements; the buyer or contract owner authorizes the commercial disposition. Koitor can discuss metal hardware samples, packaging and order coordination within its confirmed manufacturing scope, but it is not a certified laboratory, accountant, or contract adjudicator.

Destructive testing samples shipment quantity: reconcile before pack-out

A sample chosen for inspection is not automatically destroyed, retained, returned, or saleable. Its status depends on the procedure actually performed and the written scope agreed before testing. One unit may be inspected and returned unchanged; another may be consumed or altered; another may remain with a provider; and another may be held pending a report or disposition. A total “sample count” hides these differences.

Start with the quantity that the order records as due, using its stated unit basis. Then record how many units were completed, what quantity was selected, and what happened to each selected unit. Compare the final packable quantity with the agreed delivery quantity. If there is a difference, obtain a documented commercial decision before shipment rather than silently reducing the carton count or subtracting every sampled unit.

Infor’s inventory documentation offers a software-specific example of recording sample use and deducting material when a sample affects available inventory. That example helps illustrate why physical consumption should be recorded, but it does not create a contract rule for hardware orders or a universal deduction requirement. The applicable relationship is determined by the buyer’s purchase documents and written agreement.

Use mutually exclusive physical states

The reconciliation works only when the categories do not overlap. A unit selected for inspection and later retained by a provider must not be subtracted once as “selected” and again as “retained.” The word “selected” describes an event; “retained,” “consumed,” “released,” or “held” describes the unit’s current state. Track the event separately from the final state.

A practical status set is:

These are working categories for a buyer’s reconciliation; they do not decide whether an item is contractually acceptable. A provider may return material that still requires technical review. A report may cover selected specimens without certifying all units in the lot. The buyer should preserve the provider’s actual scope and the responsible person’s release decision.

Use one unique identifier per unit when practical, or another traceable method appropriate to the quantity and inspection plan. If the provider uses a sampling record rather than individual serial numbers, link that record to the lot, SKU, revision and selected quantity. Do not invent traceability that was not used.

Protect representative selection

The commercial pressure to recover every inspected unit must not change how inspection samples are selected. QIMA’s description of its product-inspection service says that its inspectors select samples independently rather than using supplier-presented pieces. This is a provider-specific procedure description, not a universal sample-size rule. The useful buyer lesson is to agree who selects the sample and preserve that responsibility.

Do not instruct a supplier to choose the “best” units simply because another set may be consumed. Do not replace selected units with hand-picked stock without the provider’s agreement. If a method requires a fresh sample, the provider or qualified authority should state how the new selection is made and whether the lot must be reviewed again. The buyer should not treat a replacement count as equivalent evidence automatically.

Before the inspection, record the provider, scope, lot or batch identity, sample-selection responsibility and any planned destructive or alteration steps. The provider determines the technical method and how many specimens it needs. The buyer’s job is to make the commercial treatment and delivery expectation clear without interfering with representative selection.

Agree consumption, custody and disposition before testing

Before units leave the supplier’s control, ask the provider what it expects to retain, return, consume, alter, photograph, or dispose of. Also ask when the status becomes known and who can authorize a different disposition. If the provider cannot determine a final status until the test is complete, reserve a reconciliation step after results arrive and before the buyer closes the shipment record.

SGS general service conditions show that provider terms can address sample custody, return, retention or disposal. The wording is specific to that provider and contract; it should not be transferred as a standard retention period or fee for other services. Read the actual booking terms that apply to the named order. Intertek’s building-product testing FAQ notes that sample requirements vary with the method and whether it is destructive; that is useful context for planning, but it is not a household-hardware sample-count instruction or a building-code requirement.

Use a written authorization that identifies:

• Which product, SKU, revision and lot are in scope.
• Who chooses or witnesses sample selection.
• Which procedure or test is requested by the qualified provider.
• Whether the unit may be altered, consumed, retained, returned or disposed of.
• Who is responsible for the decision after a report is issued.
• How unchanged returned units will be reviewed before they are considered packable.
• What happens if the provider’s actual handling differs from the plan.
• Whether any commercial quantity change needs buyer approval.

The list is a coordination checklist, not a substitute for the provider’s terms or buyer’s contract. A laboratory or inspector should confirm technical requirements. The purchase-order owner should confirm any delivery or price effect.

Reconcile the order with a transparent balance

At pack-out, prepare a balance that starts with actual completed quantity and separates the states that are not included in shipment. For example:

Completed units = packable units + held units + retained units + consumed or altered units + other documented non-packable units.

This is a physical reconciliation identity, not an invoice formula, contractual allowance, or forecast. Use mutually exclusive categories and the same unit basis throughout. If a returned sample is inspected and released, move it into packable units only after the responsible reviewer authorizes that status. If its condition is unclear, leave it held.

Then compare the packable count with the order’s delivery requirement. If they differ, record the gap and its approved disposition. Options may include a buyer-approved quantity change, additional production, another inspection, a delayed shipment, or another contractually agreed action. None is automatic. The right route depends on the agreement, product state, commercial schedule and technical review.

A clearly hypothetical example can demonstrate the arithmetic without implying a Koitor policy. Suppose a batch has 500 completed pieces. At the agreed reconciliation time, 4 are held for review, 2 are retained by the provider, 1 was consumed during an authorized procedure, and the remaining 493 have been released as packable. The arithmetic balances to 500. It does not say whether the purchase order permits delivery of 493, requires replacements, or authorizes a partial shipment. That decision must come from the contract owner and buyer.

Avoid expressions such as “deduct the five samples” unless the unit states are actually known. Some selected units may be unchanged and returned. Some may already be included in the original packing count. Some may be held rather than consumed. A single total can misstate the outcome.

Record both the count and its evidence

The final quantity record should link physical counts to evidence. A useful worksheet includes:

Do not use the commercial invoice as the only quality record. An invoice may state a commercial quantity but not reveal sample custody or why a physical count changed. Conversely, a laboratory report does not necessarily establish what quantity was contractually delivered. Keep each record within its purpose and link them with a clear order or lot reference.

Where cartons are packed by sets, kits, pairs or multiple components, define how the count translates. A “unit” may mean one piece, one retail set, or one complete assembly. The buyer and supplier should reconcile the same basis on the product record, test record, packing list and purchase order. If a sampled assembly is missing one component, do not count it as a complete set unless the approved scope says so.

Maintain chain of custody without overstating traceability

The custody record should answer where the selected unit went, who handled it, and what condition it returned in. Identify the provider’s receipt record, sample label, report reference and return or disposal note when those records exist. Avoid claiming complete serial-level traceability if the sampling method used only lot identifiers.

A unit returned after an inspection may be physically unchanged but still require a release decision. A visual photograph alone may not show whether a hidden part was removed or a finish was altered. A unit retained for additional review is not available for pack-out merely because the buyer paid for it. Likewise, a unit consumed during an authorized test should not re-enter stock as an unchanged product.

If a custody gap occurs, record it as an open issue. Do not backfill a guessed status or count. The buyer can request a recount, written confirmation, additional inspection or another remedy under the agreement. The appropriate response is a project decision, not a universal rule.

Handle rework, replacement and retesting carefully

A short packable count can result from several causes: authorized consumption, a hold, rejection, rework, damage or a counting error. Separate the cause before choosing a remedy. Rework may change the product and require another review. Replacement units may come from a different production lot. Additional inspection may require provider approval and a revised plan. Do not silently combine replacements with previously released goods if their identity or revision differs.

If a replacement is proposed, link it to the original order line and the reason for the change. Identify whether it was produced to the same approved revision, whether the provider must inspect it, and whether the new quantity restores the order requirement. The responsible technical authority decides whether the replacement needs further inspection; the buyer controls the commercial acceptance.

If a selected unit was not consumed but remains with a provider, its return date may be uncertain. The buyer can either wait for its return and review or treat it as unavailable for the present pack-out while pursuing the agreed commercial disposition. Do not count it in both the shipment and provider-retained inventory.

Separate evidence of quality from permission to ship

Passing an inspection is one part of the release record, not a substitute for quantity reconciliation. A report’s scope may be limited to the selected specimens, method and date. It does not automatically certify every unit or determine the purchase-order quantity. A shipment can have a satisfactory quality report and still have an unexplained short count. It can also have the expected count while some units remain on quality hold.

Keep the release decision explicit. Quality or the authorized reviewer records whether the lot or selected units meet the agreed acceptance process. Procurement or the contract owner records whether the packable quantity satisfies the commercial requirement or whether an approved deviation exists. Logistics records the actual packed quantity and carton count. These responsibilities may sit with different people; the records should still reconcile.

If an article of hardware has a surface finish, weld, coating or assembly feature that could be affected by testing, the technical provider should state whether the sample remains representative after handling. Do not infer that a returned specimen can be sold or shipped merely because it looks intact. Nor should the buyer claim that every sample is consumed simply because one destructive test is planned.

Common quantity-control failures

The most common process weaknesses are avoidable:

• Subtracting every selected unit even when some were returned unchanged and released.
• Counting a retained unit twice under both “selected” and “retained.”
• Packing a unit that was still held or altered.
• Reducing the shipment quantity without an approved commercial decision.
• Asking the supplier to hand-select attractive units for inspection.
• Treating a provider’s sample requirements as a universal standard.
• Assuming a report covers all units in the order.
• Using “sample quantity” without stating whether it means selected, retained, consumed or unavailable.
• Comparing carton count with piece count without converting the basis.
• Closing the purchase record before provider custody and final unit status are known.

A control does not have to be complicated. Use a short reconciliation after testing, identify the owner for each unresolved status, and do not release the pack list until the quantities agree or a documented deviation is approved.

Coordinate with existing sample and delivery controls

This guide complements rather than replaces other controls. The existing sample teardown and approval guide addresses identity, custody and what may be done to a sample. The partial-delivery and quantity-tolerance guide covers order-level quantity differences. Use the sample guide when the question is how a reference unit may be examined or altered; use the delivery guide when the question is how to control a shortage or partial shipment. This article connects those boundaries at pack-out.

For custom metal hardware, the supplier may be able to prepare a sample or packing plan after the product and order details are confirmed. The actual test procedure, specimen count and acceptance rule must come from the responsible provider and buyer’s quality plan. Koitor’s approved capability does not include a certified laboratory or universal testing service, and this article does not suggest otherwise.

Release only after the quantity states reconcile

Before sealing cartons, confirm that completed quantity, final unit states, packable count, order requirement and approved disposition are all recorded on a consistent basis. Resolve every retained, consumed, altered or held item. Recheck that the packing list and carton labels reflect actual packed contents. If any quantity difference remains, identify the person who authorized it and link the approval to the order.

A buyer can make a release decision when the physical reconciliation balances, technical status is clear for all units counted as packable, and the commercial treatment of any difference is approved. Hold shipment when unit identity is uncertain, an inspected sample’s status is unknown, the provider has not confirmed custody, or the buyer has not approved a quantity change. These are specific open issues, not reasons to invent a universal sample allowance.

Escalate differences without changing the evidence record

When the number of completed units does not reconcile with the final unit states, stop and locate the first unexplained difference. Recounting the cartons may resolve a packing error, but it does not explain whether an inspected unit was retained or altered. Compare production completion, provider receipt, sample-selection notes, return records, hold tags and pack-out counts in sequence. Keep the original records intact and add a dated correction or reconciliation note rather than overwriting a provider’s record.

Assign each open item to the person who can resolve it. The provider can confirm which specimens it received and what disposition it recorded. The manufacturer can confirm production completion and the identity of units it still holds. The buyer’s quality owner can decide whether an unchanged return is eligible for release under the agreed process. The purchase-order owner can authorize a commercial quantity change or replacement arrangement. These decisions are related, but one person may not have authority to make all of them.

If the evidence remains incomplete, state the unresolved quantity and its worst-case status explicitly. For example, mark a unit “status unconfirmed; excluded from packable count pending provider response” rather than assuming it was returned or consumed. This conservative record is not a defect finding and does not prove loss. It simply prevents an unknown item from being represented as available stock until the responsible party supplies evidence.

After resolution, preserve the link between the revised count and the approval. A later reviewer should be able to understand what changed, who confirmed it, which record supports the decision, and whether the packing list or order quantity was updated. This audit trail helps prevent an exception in one batch from becoming an undocumented standing allowance for future orders.

Buyer checklist before approval

Before releasing the order, record the following for the exact model and revision: Purchase-order quantity and unit basis; completed quantity; selected sample IDs; each unit’s final state; provider/buyer custody; consumption or alteration; released quantity; retained or held units; approved shipment balance; responsible disposition owner; and supporting records. Resolve any open point with the party responsible for that specification; do not treat an unanswered field as approval.

Frequently asked questions

Are all inspection samples destroyed?

No. A sample may be inspected unchanged, retained, held, consumed or materially altered. Record its actual final physical state.

Who decides whether test units reduce shipment quantity?

The buyer and supplier’s agreed commercial documents control disposition. A test provider defines its method, but does not automatically decide the order balance.

Does the number selected for testing equal the number to deduct?

No. Selection is an event, not a final state. Reconcile each selected unit once as released, retained, consumed, held or rejected.

Sources

• Infor inventory sample management documentation
• QIMA product inspection service description
• SGS General Conditions of Services
• Intertek building-product testing FAQ
• Koitor sample teardown and approval
• Koitor partial-delivery and quantity tolerance guide