A steel structure concession release checklist helps EPC buyers control deviations that are proposed for acceptance rather than full correction. A concession is not a casual waiver. It is a documented decision that a specific nonconforming condition can be accepted within defined limits because the remaining risk is understood, approved, and traceable.
This checklist is useful when reviewing minor dimensional deviations, coating repair limits, missing non-critical records, alternate material documentation, packing deviations, or other issues that may not justify holding an entire shipment. It gives procurement, quality, engineering, and site teams a common way to decide whether concession release is acceptable.
1. Define the deviation precisely
The concession request should describe the deviation in a way that can be checked later. Avoid broad wording such as "minor defect" or "acceptable variation." Identify the affected component marks, package numbers, drawing revision, specification clause, measured value, required value, location, quantity, and photos or inspection records.
If the deviation cannot be identified by mark or document reference, the buyer should not approve release. Unclear concessions create disputes during site receiving, erection, owner handover, or warranty discussions.
2. Separate concession from repair approval
A concession means the buyer accepts a deviation under stated conditions. A repair approval means the supplier is allowed to correct a deviation using an approved method. These are not the same decision. Some items need repair before release, some can be accepted as-is, and some can be released only after limited touch-up or additional evidence.
| Decision type | Typical use | Release requirement |
|---|---|---|
| Accept as-is | Minor deviation with no functional or site impact. | Concession approval and mark list. |
| Repair then release | Defect can be corrected before shipment. | Approved repair method and closeout evidence. |
| Conditional release | Open item can close after loading. | Owner, due date, and post-shipment evidence. |
| Reject or hold | Structural, safety, installation, or owner acceptance risk. | Do not ship affected item. |
3. Check approval authority
The approval authority must match the risk. Procurement can record the commercial effect, but it should not approve technical deviations alone. Engineering should review structural performance, material substitution, connection fit-up, tolerance exceptions, and any issue that may affect installation or service life. Quality should review inspection evidence, NCR closure, repair records, and traceability. The owner may need to approve deviations linked to project specifications or witness points.
Record the approver name, role, date, and basis of approval. If the approval is issued by email, store the email with the concession register and reference it in the release file.
4. Review structural and installation impact
A concession should never be evaluated only by whether the item can be loaded into a container. Check whether the deviation can affect connection fit, bolt alignment, erection sequence, site welding, coating durability, fireproofing interface, cladding connection, crane access, or owner inspection. A deviation that seems small at the factory may become expensive if it delays erection.
Ask the site team whether the item can be installed without rework. If the site team needs a special instruction, include that instruction in the handover package before the material arrives.
5. Set repair and touch-up limits
Some concessions are approved only after a limited repair or touch-up. The checklist should state what repair is allowed, who performs it, what method is used, and what evidence is required. For coating issues, this may include surface preparation, compatible repair material, dry film thickness record, curing time, and final photo evidence. For dimensional issues, it may include re-measurement after correction and inspector confirmation.
Do not let a concession become an uncontrolled repair. If the repair changes a connection, weld, hole, or load path, require engineering approval before release.
6. Connect concession to NCR closeout
Most concession decisions should be linked to an NCR, inspection comment, or quality hold record. The NCR should show the original nonconformance, root cause if required, disposition, concession approval, corrective or preventive action when needed, and final release status.
If the supplier requests concession without opening or referencing the related quality record, the buyer may lose traceability. This is risky when similar defects appear again in later batches.
7. Control document and marking effects
A concession may change the final document package. The as-built record, inspection report, packing list, mark list, or handover note may need an update. If a component is accepted with a deviation, make sure the same component mark is traceable in the document set and not hidden under a general shipment approval.
For export projects, this is especially important because the site team may receive the cargo weeks after the factory decision. They need a clear record of what was accepted and what evidence supports the acceptance.
8. Assess commercial and schedule risk
Concession release can save time, but it may also transfer risk if not written clearly. Confirm whether the supplier remains responsible for any site cost, additional documentation, warranty effect, or corrective action if the accepted deviation later causes a problem. Do not approve vague concessions that make later responsibility unclear.
If release is granted to avoid shipping delay, state that the concession does not remove supplier responsibility for defined closeout actions or repeated defect prevention.
9. Keep a concession release register
A concession release register should be short enough to maintain but detailed enough to defend the decision. It should list concession number, NCR or inspection reference, affected marks, deviation description, measured value, specification requirement, approval authority, disposition, required evidence, shipment batch, site instruction, closeout date, and supplier performance note.
| Register field | What to capture |
|---|---|
| Affected scope | Component marks, package IDs, quantity, drawing revision. |
| Technical basis | Specification clause, measured deviation, engineering comment. |
| Approval | Buyer, engineering, quality, owner, or site acceptance. |
| Release condition | Accepted as-is, repair before release, conditional closeout, or hold. |
| Evidence | Photos, inspection records, revised documents, signed approval. |
10. Use concession patterns in supplier review
One concession may be reasonable. Repeated concessions for the same defect pattern suggest a supplier process issue. Track whether the same shop, team, drawing type, coating process, or packing method keeps creating requests for acceptance. This turns concession data into supplier performance evidence instead of isolated paperwork.
When reviewing a supplier for repeat work, compare concession frequency, response speed, quality of evidence, and whether corrective actions prevented recurrence in later batches.
Warning signs
- The concession request does not identify affected marks or measured values.
- The supplier asks for acceptance without linking the issue to an NCR or inspection comment.
- Procurement approval is used for a technical or engineering deviation.
- The concession affects installation fit but the site team has not reviewed it.
- Repair evidence is promised later without a due date or responsible owner.
- Repeated concessions appear for the same defect without corrective action.
Buyer note
Concession release is a controlled exception, not a shortcut. It should protect schedule only when the remaining risk is specific, accepted by the correct authority, and traceable through shipment and site handover. If the deviation is unclear, critical, repeated, or outside approval authority, hold the affected item until the release basis is stronger.