Sep 18, 2026Manufacturing & Capabilities
Reading a Knitted Compression QC Report: A Buyer's Field Guide
A QC report is not a certificate; it is a chain of gate records. Here is how to read it gate by gate, cross-check it against your order, and spot what is missing.
Direct answer (the short version). A QC report is not a certificate; it is a chain of gate records. A usable report answers four questions at every checkpoint: what was checked, how it was checked (method and sampling basis), what the acceptance criteria were, and what the result was — a value, or a defect and its disposition. Add the order and lot identifier, the inspector, the date and the evidence attachments, and the record becomes auditable. If a gate has no record, treat it as not done. This page reads that record gate by gate and cross-checks it against your own order. If you are still choosing a custom compression sock manufacturer, start there; test reports and compliance documents are covered separately.
1. Three documents buyers mix up
When a supplier sends a folder of quality documents, the first job is not to read the paperwork — it is to sort it. Three document types get filed together and get read as if they were the same thing. They are not, and confusing them is the fastest way to sign off a batch on evidence that was never about that batch.
QC / inspection report — a process record
This is the document this page is about. It records that a specific order or lot was checked at a specific gate, on a specific date, using a stated method, against a stated acceptance criterion, with a stated result. It is evidence about your order in production or at hand, gate by gate.
Test report — a laboratory result
A test report records a value measured on a specific sample by a specific method in a laboratory — for example a measured property under a defined test method. It tells you what happened to that sample under that method, not what an inspector found across your running order. Reading a test report properly is its own skill; the report anatomy, certificate types and the compliance document set are covered in the compliance document and test report guide.
Certificate / declaration — a statement of conformity
A certificate or declaration states conformity — a product, a system or a process is asserted to meet something. It is not the inspection result for your batch. A supplier can hold every certificate it has and still ship you a lot with an undocumented defect, because the certificate was never a claim about this lot. Certificates answer "what is declared?", inspection records answer "what was checked on my order?"
The three types side by side
QC / inspection report: A process record of checks on your order or lot — What was checked on my order, how, and with what result? — Whether a laboratory value meets a standard
Test report: A laboratory result measured on a specific sample — What did this sample measure under this method? — Whether my whole running order was checked
Certificate / declaration: A statement of conformity by a responsible party — What is declared or asserted? — What was checked on this specific batch?
Why the mix-up causes trouble
Three common cases, each a file-sorting error rather than an inspection failure:
A certificate: A conformity statement — Says nothing about this batch's inspection result
A test report: A lab result on one sample — Says nothing about the running order across gates
A few finished-product photos: An image of some units — No method, no criteria, no lot link, no disposition
One related distinction is worth stating once, because it is easy to blur: a visual workmanship check and a performance test answer different questions and belong in different documents — the first records what an inspector saw, the second records what a laboratory measured — so a clean appearance check is not a substitute for a test result, and a test result does not document the order's workmanship.
2. What makes a QC report auditable
"Auditable" means: someone who was not there, and who does not trust you or the supplier, can follow the record and reach the same conclusion. That needs fields, not prose.
The required-field table
Use this as the checklist for any gate record. If a gate's entry is missing one of the middle fields, the record is not yet auditable — it may still be true, but you cannot verify it.
Order / PO number: The order the record belongs to — Ties the record to your purchase, not a generic run
Lot or roll number: The specific production lot / yarn or roll — Lets you trace which units the record covers
Product / size / construction (including closure): Which item was checked, and its closure type — Confirms the gate checked what you are buying
Gate name: Which checkpoint this entry belongs to — Lets you see which gates were covered
Inspection item: What was checked — The subject of the record
Method and sampling basis: How it was checked, and which sampling plan was applied — ask the supplier which plan it uses and request the written version — Without the basis, a result cannot be reproduced or compared
Acceptance criteria: The pass/fail rule applied — A result is meaningless without a criterion
Result: A value, or a defect description — The actual finding
Defect classification and disposition: Severity class, and what happened (release / rework / concession) — Tells you how the finding was handled, not just that it existed
Inspector / role: Who performed the check — Accountability and traceability
Date: When the check was performed — Sequence versus production and shipment
Evidence attachments: Photos, measurement records — Backs the entry with raw evidence
The decision rule has to be written down
A record that says only "pass" or "fail" with no criterion is not usable. You cannot tell whether "pass" meant a measured value inside a stated tolerance, a visual judgement, or an assumption. Ask for the criterion in writing. If the supplier's answer is "we know it when we see it", that is your answer too — the record cannot be audited.
Who set the sampling plan and the criteria?
There are two possibilities, and they are not equivalent:
Supplier-set — the factory applied its own internal plan and its own criteria. Ask for the written version of both.
Agreed — the plan and criteria were fixed in the order, the technical file or a signed specification. Ask where they are written and request that document.
Either way, get it in writing. A verbal "standard practice" is not a criterion you can hold anyone to. Proposal-level QC questions, asked before you place an order, belong to a different article: how a knitted support supplier builds buyer confidence. This page assumes the order exists and the record has been issued.
3. Gate by gate: the seven checkpoints and what each record must show
The checkpoint order below follows Aby-Tex's own site description of its quality-control process, presented as seven gates: raw-material confirmation, pre-production sample approval, dimension / size check, in-process check, appearance / workmanship check, packing verification and pre-shipment final inspection. Treat this as a process description — it is not a certification, not an inspection standard, and not an endorsement of any report template. Other manufacturers will name and split their gates differently; what matters is that each gate leaves a record you can audit. The QC stage also sits inside the wider order timeline, which is broken into components in planning lead times and trial orders for a first knitted support order.
Each gate below states three things: what the record should show · what you should ask · the red-flag signal.
Gate 1 — raw-material confirmation
What the record should show: which yarn, trims and closures this lot used, and their reference against the approved materials.
Ask: does the record match the approved sample and technical file, and how is a change of yarn lot recorded?
Red flag: the record names a material but not which lot, so a substitution would be invisible.
Gate 2 — pre-production sample approval
What the record should show: the version of the pre-production sample that was approved, and the approver and date.
Ask: which sample version is the production baseline, and can the approval be produced in writing?
Red flag: a record that says "sample approved" with no version, no approver and no date. (The sampling decision gate as a process belongs elsewhere; here you are only asking what the record shows.)
Gate 3 — dimension / size check
What the record should show: the measurement points, the measurement method, the tolerances applied and the actual measured values.
Ask: does the check cover every size you intend to sell, including the largest in the run?
Red flag: a single measurement point, or only the middle size.
Gate 4 — in-process check
What the record should show: the sampling frequency and the timing of in-process checks, plus how an anomaly triggers a stop or an isolation.
Ask: how often during the run were checks taken, and what happens to production when one fails?
Red flag: no frequency or timing — only a note that the process "was monitored".
Gate 5 — appearance / workmanship check
What the record should show: which surfaces were inspected — stitching, closures, anti-slip band, loose threads, stains — and how defects were classified and decided.
Ask: which defect classes were applied, and what was done with each class?
Red flag: defects listed with no classification and no disposition.
Gate 6 — packing verification
What the record should show: unit packing, label content, and carton and shipping-mark checks against the order.
Ask: which packing and labelling points were verified, and against which approved artwork or label version?
Red flag: a packing note with no reference to the approved label content or carton marks.
Gate 7 — pre-shipment final inspection
What the record should show: the final sampling basis, the overall verdict, how any nonconforming items were disposed of, and whether a third-party report is attached.
Ask: on what basis was the lot released, and what happened to the nonconforming portion?
Red flag: a final "passed" with no nonconformance disposition, or a report dated after the goods shipped.
The seven checkpoints at a glance
1. Raw-material confirmation: Yarn / trims / closures used, by lot — Does it match the approved materials, and where is a lot change recorded? — Material named, lot not
2. Pre-production sample approval: Approved sample version + approver + date — Which version is the baseline; can approval be produced in writing? — "Approved" with no version, approver or date
3. Dimension / size check: Measurement points, method, tolerances, actuals — Does it cover every size you sell, largest included? — One measurement point or middle size only
4. In-process check: Sampling frequency, timing, stop / isolation trigger — How often were checks taken; what happens on a fail? — "Was monitored", no frequency or timing
5. Appearance / workmanship check: Surfaces checked, defect classes, decisions — Which defect classes, and what was done with each? — Defects with no class and no disposition
6. Packing verification: Unit pack, label content, carton and marks — Which packing points verified, against which approved version? — Packing note with no approved label reference
7. Pre-shipment final inspection: Final sampling basis, verdict, nonconformance disposition, third-party attachment — On what basis was the lot released? — "Passed" with no disposition, or dated after shipment
4. Reading the numbers without inventing them
The hardest part of this document type is what it does not tell you. Many QC reports carry at least one number — a count, a level, a result — and the temptation is to fill the gaps around it with assumptions. Do not. Here is what to request in writing instead, and what to refuse.
Written items to request from the supplier
The sampling plan and inspection level actually applied, in its written version.
The defect definitions and severity classes used.
The acceptance decision rule — how a count of defects becomes a pass or a fail.
The inspection scope — sampled vs. 100% inspected, and which gates were sampled.
The nonconformance disposition process — who decides, and how it is recorded.
What not to accept
An isolated "pass" or "fail" with no criterion behind it.
A number with no stated method and no stated sampling basis.
A report with no lot and no order metadata — a result you cannot attach to your purchase.
A criterion described only verbally, or reconstructed after the fact.
A general-practice note, not an Aby-Tex claim
When a record does carry a number, ask what produced it: which decision rule was applied, and against what stated sample size. A verdict you cannot trace back to a stated rule is a verdict you cannot audit — and the rule is the supplier's to state in writing, not yours to assume. This page deliberately gives no specific graded values, no standard numbers and no sample sizes — those are exactly the items you ask your supplier to supply in writing, and confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
5. Cross-check the report against your own order
A flawless internal record that describes someone else's product is not your evidence. This step takes only a few minutes, and in practice it is where a lot of the expensive errors surface.
Item-by-item comparison
Put the report next to your order and confirm, value by value:
Product, size and construction — including the closure type — are the ones on your PO.
The lot on the report can be traced to your order, not to a general production run.
The gates listed are the gates your order required, not a shorter default set.
Any nonconformance called out is accompanied by a disposition that matches what happened to your goods.
"This time" versus "every time"
On a repeat order, the value of the record comes from comparability. Ask that the same gates, the same method and the same criteria reappear, so the second record can be read against the first. If a field quietly changes between orders, the comparison stops working — and the change is itself the finding.
What invalidates an existing report
An inspection record is tied to a lot and a configuration. It stops being usable evidence when the thing it describes changes: a different yarn, a changed construction, a new size range or a different production site. When any of those move, the record has to be refreshed. Aby-Tex's own description of flexible OEM capabilities is useful background for how far a configuration can flex — and therefore how often the record needs to be re-cut. On a repeat order, the parts of the request that reach beyond quality documents — listing and replenishment execution — are handled in launching a private-label compression sock brand on Amazon.
6. Red flags and what to do about them
Unhelpful QC reports tend to fail in a few recognisable ways. The list below is the one to keep beside you.
Red-flag checklist
No lot or order identifier — the record cannot be tied to your purchase.
No method, or "internal self-check" with no criteria — the result cannot be reproduced.
Only finished-product photos attached — no method, no criterion, no lot link, no disposition.
Criteria written after the fact — the rule appears only once a result needed defending.
A gate missing with no explanation — silence is not a pass.
Nonconforming items with no disposition record — you cannot see what happened to the affected units.
A report dated after shipment — inspection that follows dispatch is not pre-shipment evidence.
When you find a nonconformance
Request the disposition conclusion — what was decided about the affected units — and the corresponding corrective and preventive action (CAPA) records, so you can see whether the cause was addressed or only the symptom contained. Then ask explicitly whether the lot was released, and on what basis. A release with no stated rationale is the point at which a quality problem becomes a commercial risk you carry alone.
When to consider third-party verification
Independent inspection or testing tends to earn its cost in two situations: the supplier's own record is thin on method and criteria, or your channel or end customer requires independent verification before accepting the goods. Aby-Tex's site mentions optional third-party inspection and testing, such as SGS or Intertek. That is a description of an available service — it is not a certification, and it does not represent any existing result for any batch. What markets and channels expect here varies, and is discussed in compression solutions for different markets.
7. One-page QC report audit checklist (printable)
Print this, fill one row per gate, and send it with your order details. It compresses the whole page into a single sheet.
Order / PO: _ Product and size: _ Production lot: _ Target arrival window: _
1. Raw-material confirmation: Use / lot statement — Materials match approved?
2. Pre-production sample approval: Approved sample version, approver, date — Baseline version clear?
3. Dimension / size check: Measurement points, method, tolerances, actuals — Covers every size sold?
4. In-process check: Frequency, timing, stop / isolation trigger — Frequency stated?
5. Appearance / workmanship check: Surfaces, defect classes, decisions — Classes and dispositions present?
6. Packing verification: Unit pack, label content, carton and marks — Matches approved label version?
7. Pre-shipment final inspection: Final sampling basis, verdict, disposition, third-party attachment — Release basis stated?
Written sampling plan and acceptance rules: Supplier's written version — Method and criteria present?
Nonconformance / CAPA records: Disposition and corrective records — Disposition matches your goods?
Before you send it, check that every row is either filled in or explicitly marked "to confirm" — a blank row is a question you still need to ask.
8. Quick answers (FAQ)
What is the difference between a QC report and a test report?
A QC / inspection report is a process record: it states that a specific order or lot was checked at a specific gate, using a stated method and criterion, with a stated result. A test report is a laboratory result: it records a value measured on a specific sample by a specific method. The first is evidence about your running order; the second is evidence about a sample under a method. The deeper treatment of test reports, certificates and compliance document sets is on its own page. Confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
What must an inspection report contain to be usable?
For each gate: what was checked, how it was checked (method and sampling basis), the acceptance criterion, and the result — plus the order and lot identifier, the inspector, the date and any evidence attachments. If a gate entry is missing its method or its criterion, the record is not auditable, even if the outcome was fine. Confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
Who should set the sampling plan and the acceptance criteria?
Either the supplier applies its own internal plan and criteria, or the two of you fix them in the order or technical file. What matters is that you can see which of the two it is, in writing. Ask for the written sampling plan, the defect definitions and the acceptance rule actually applied. This page does not supply a sampling plan for you to assume. Confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
What if the report has no AQL value on it — how should I read it?
You do not need to invent one, and you should not accept a substitute. Ask the supplier which sampling plan and acceptance rule it actually applied and request the written version. If the supplier cannot produce a written basis, treat the record as unverifiable on that point and decide what that means for your release. This page deliberately states no specific graded values, standard numbers or sample sizes. Confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
What should I request after a nonconformance is found?
The disposition conclusion for the affected units, the corrective and preventive action (CAPA) records, and an explicit statement of whether the lot was released and on what basis. That tells you whether the root cause was addressed or only the symptom contained. Confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
When is third-party inspection worth it?
When the supplier's own record is thin on method and criteria, or when your channel or end customer requires independent verification before accepting the goods. Aby-Tex's site lists optional third-party inspection and testing, such as SGS or Intertek — an available service, not a certification and not an existing result for any batch. Confirm against your supplier's written terms, your order's technical file and the current rules at your destination.
9. Next step
Take the one-page checklist from Section 7, fill in your own fields — order / PO, product and size, production lot and target arrival window — and send it to the manufacturer to request the gate-by-gate inspection records for that order (all seven gates), the written version of the sampling plan and acceptance rules, the pre-production sample approval record, and the nonconformance disposition records. Use the contact page (/contact-us) or email sales@aby-tex.com; Aby-Tex states a target of a reply within 24 business hours and a 7-day target for custom sampling on its site.
