Receiving inspection: checklist, sampling and hold rules
Check each shipment against the PO, size the sample to the part's risk, and hold unverified stock out of the ERP until it clears.
Teams that check paperwork and product before releasing stock, and hold anything unverified in a status the ERP won't allocate, keep bad material off the build and keep the schedule working from numbers it can trust. A part that clears receiving without a real check can sit in stock as good material until it reaches the line and fails there, at a much higher cost to fix. Receiving inspection is the checkpoint between a supplier's shipment and a work order that can draw on it.
What is receiving inspection?
Receiving inspection is the check a buying organization runs on a purchased part when it arrives, before releasing it to usable stock. It compares the shipment's paperwork and physical condition against the purchase order and the drawing, then applies a dimensional or functional sample per the part's inspection plan. Only accepted material becomes available to a work order.
What should you check before stock is usable?
Receiving inspection runs in two passes. The first checks the shipment's paperwork against the PO line: part number and revision, quantity, the certificate of conformance or test reports, packaging and labeling, and any shelf-life date. The second checks the part itself, first for shipping damage, then dimensionally or functionally against the sampling plan the part calls for.
Run this checklist on every shipment before it clears to stock:
- PO line part number and revision
- Quantity against the PO and packing list
- Certificate of conformance or mill test report present, with heat or lot matching the parts
- Packaging and labels against the PO
- Shelf-life or cure date against the build date
- Shipping damage
- Sample per the inspection plan
Compare the part number and revision together. A supplier building from an old drawing delivers a part that's wrong even though everything else about it matches. Match the certificate's heat, lot, or batch number to the marking on the parts themselves, not only to the paperwork. Check for shipping damage before the parts go near a gauge, so a dent isn't logged as an out-of-tolerance dimension.
From dock to usable stock
A four-step left-to-right flow showing how a shipment moves from receipt to usable stock. Step one, receipt posted in inspection status, records the shipment in the ERP as received but not yet available to a work order. Step two, paperwork check, compares the part number, revision, quantity, certificates, packaging, labels and shelf-life date against the purchase order. Step three, physical or sample inspection per plan, checks the part itself for damage and against its dimensional or functional sampling plan. Step four branches three ways: accept to stock, where the material becomes available to a work order; hold, where an open question keeps it in inspection status; or reject to MRB, where the material review board disposition sends it to the nonconforming-material process.
- 1
Receipt posted
- What happens
- Shipment is logged against the PO in an inspection status
- Where the part sits
- Received, not available
- Who acts next
- Receiving clerk or inspector
- 2
Paperwork check
- What happens
- Part number and revision, quantity, certificates, packaging, labels and shelf-life date are compared to the PO line
- Where the part sits
- Inspection status
- Who acts next
- Receiving inspector
- 3
Physical or sample inspection per plan
- What happens
- Visual check for damage, then dimensional or functional sampling sized to the part's risk and the supplier's record
- Where the part sits
- Inspection status
- Who acts next
- Receiving inspector or SQE
- 4
4a. Accept to stock
- What happens
- Material passes and becomes available to a work order
- Where the part sits
- Usable stock
- Who acts next
- Planner can now allocate it
- 5
4b. Hold
- What happens
- An open question, such as a missing certificate, keeps the lot from a final disposition
- Where the part sits
- Inspection or quarantine status
- Who acts next
- Buyer or SQE resolves the open item
- 6
4c. Reject to MRB
- What happens
- A confirmed nonconformance routes the lot to the material review board
- Where the part sits
- MRB queue
- Who acts next
- Material review board
A shipment only becomes usable stock after its paperwork and its product both clear the plan; until then it stays in a status MRP can't allocate.
How much of a lot should you inspect?
How much of a lot to inspect follows a sampling plan sized to the part's risk and the supplier's record. ANSI/ASQ Z1.4-2003 (R2018) and ISO 2859-1:2026 both index sample size and acceptance number to an acceptance quality limit, the lot size and an inspection level, and switch between normal, tightened and reduced inspection as results come in.
A c=0 plan, where any nonconforming unit in the sample rejects the lot, avoids accepting a lot with known defects and needs no switching rules; some aerospace customers require one in their quality clauses. A supplier with a sustained record of clean lots can earn skip-lot inspection, where only some lots in a sequence get checked, or dock-to-stock status, where its material goes straight to stock on the strength of its own controls. ISO 2859-1:2026 formalizes skip-lot with its own qualification and switching requirements. ISO 2859-1:2026, clause 9.5. Grant that status per supplier and per part. A supplier that has earned dock-to-stock for a fastener hasn't earned it for a critical machined part from the same shop, and a nonconformance found later should suspend the status until the supplier requalifies.
Inspection depth by supplier and part risk
A labelled example matrix crossing supplier history, from proven to new or recently nonconforming, against part risk, from low to high or critical, to show a typical inspection depth. A proven supplier on a low-risk part typically earns dock-to-stock. A proven supplier on a high-risk or critical part typically gets a sampling plan sized to the risk, such as a c=0 or tightened plan, not skip-lot. A supplier with a mixed or limited history on a low-risk part typically gets a standard sampling plan, and on a high-risk or critical part gets tightened inspection or a c=0 plan. A new supplier, or one with a recent nonconformance, on a low-risk part typically gets a normal sampling plan until a record is established, and on a high-risk or critical part gets 100 percent inspection. The matrix is labelled as an illustrative example, not a fixed rule.
| Supplier history | Part risk | Typical inspection depth (example) | What would change it |
|---|---|---|---|
| Proven: sustained record of clean lots, qualified process | Low | Dock-to-stock | A nonconformance suspends the status until requalified |
| Proven: sustained record of clean lots, qualified process | High or critical | Sampling plan sized to the risk (c=0 or tightened), not skip-lot | A design or process change resets the earned status |
| Mixed or limited history | Low | Sampling plan per ANSI/ASQ Z1.4 or ISO 2859-1 | A run of clean lots can earn reduced status over time |
| Mixed or limited history | High or critical | Tightened inspection, or a c=0 plan | A run of clean lots can earn a normal or reduced plan over time |
| New, or a recent nonconformance | Low | Normal sampling plan until a record is established | A sustained clean record supports moving to reduced inspection |
| New, or a recent nonconformance | High or critical | 100 percent inspection | A sustained clean record supports moving to a sampling plan |
This is a worked example of how supplier history and part risk can be combined to set inspection depth; the specific cells are illustrative, not a universal formula.
What do quality standards expect when you rely on supplier data?
When you accept a supplier's test report instead of testing the material, AS9100D clause 8.4.2 requires evaluating that data and confirming the product meets requirements. Where you or your customer have identified raw material as a significant operational risk, such as a critical item, the clause also requires validating that the test reports are accurate. AS9100D, clause 8.4.2.
If your team, or your customer, plans to verify product at the supplier's own site rather than at your dock, AS9100D clause 8.4.3 and ISO 9001 clause 8.4.3 both require that intent to be stated up front, in what you send the supplier with the order. AS9100D, clause 8.4.3; ISO 9001, clause 8.4.3. Put it on the PO or the quality clause, name what will be verified and when, and the supplier can plan for the visit.
Medical device purchasers work under a comparable rule. ISO 13485:2016 clause 7.4.3 ties the extent of verification to the results of your supplier evaluation and to the risk carried by the purchased product, so a supplier with a strong history and a low-risk part earns a lighter check than a new source making a critical component. ISO 13485:2016, clause 7.4.3.
In the United States
Since February 2, 2026, the FDA's Quality Management System Regulation (QMSR) incorporates ISO 13485:2016 by reference into 21 CFR Part 820, so a device maker's purchasing and receiving controls now run on the ISO 13485 text itself. FDA, Quality Management System Regulation (QMSR). 21 CFR 820.10(a). Clause 7.4.3's risk-based extent of verification is therefore an enforceable Part 820 requirement for a device maker, so FDA can inspect your receiving plan against it. Confirm how your quality system maps clause 7.4.3 to your own receiving procedure with your regulatory affairs team.
What happens if you accept a shipment without inspecting it?
In several legal systems, taking delivery without objecting to it promptly can itself count as accepting the goods as delivered, which narrows your options if a defect surfaces later. Inspect promptly and notify the supplier of any defect in writing, and you keep your remedies open.
In the United States
Unless the contract says otherwise, a buyer has the right to inspect goods at any reasonable place, time, and manner before paying or accepting them. UCC § 2-513(1). Failing to make an effective rejection after a reasonable opportunity to inspect counts as acceptance. UCC § 2-606(1)(b). Once you've accepted, you must notify the seller of a breach within a reasonable time after you discover it or should have discovered it, or you're barred from any remedy for that breach. UCC § 2-607(3)(a). A dated inspection record shows when you had the chance to inspect and when you found the defect, which are the two dates the reasonable-time tests turn on. States enact the UCC with variations, so check your contract and counsel.
Selling into the EU?
EU law doesn't harmonize when a buyer must inspect delivered goods or object to a defect, so German law is shown here. Between merchants, the buyer must inspect delivered goods without delay after receiving them, so far as feasible in the ordinary course of business, and give the seller notice of any defect found, also without undue delay. Without that notice, the goods count as approved, except for a defect the inspection couldn't reveal, which still needs prompt notice once discovered. § 377 HGB. Quality agreements between buyer and supplier can restate or adjust this duty, for example by fixing inspection methods, sampling levels, or notice periods for specific parts. For a cross-border sale between businesses in different CISG Contracting States, which covers every EU member state except Ireland and Malta, the CISG governs in place of § 377 HGB unless the contract excludes it. CISG, Arts. 1 and 6. It requires the buyer to examine the goods within as short a period as practicable and give notice specifying the defect within a reasonable time, with a two-year outside limit running from when the goods were handed over, unless that conflicts with a contractual guarantee period. CISG, Arts. 38–39.
Where does inspection status live, and why does it matter for scheduling?
Material that hasn't cleared receiving inspection needs its own status in the ERP, separate from stock a work order can draw on. Without that separation, MRP treats unverified material as available and a planner promises a date the part can't support. Hold it in an inspection or quarantine status until it's accepted, rejected, or sent to the material review board.
Only stock that has cleared this status should count toward clear-to-build. Unverified or held material isn't usable stock yet, whatever the ERP's on-hand quantity shows.
Time spent in receiving is a real part of your lead time, even though no purchase order shows it. For example, a part that sits three days waiting for a receiving inspector, or two weeks waiting for a paperwork question to close, delays the build by that much, whether or not anyone is tracking it as a delay. Watching that queue is as much a part of keeping a schedule honest as watching the open PO list.
When paperwork is missing or wrong, for example a certificate that doesn't match the heat number on the parts, or a supplier hasn't answered a question about a rejected lot, someone has to chase it. Your team can open each request as a task and hand it to Scout Agent, who follows up with the supplier by email and phone while the lot stays on hold.
Questions teams ask
Who should own receiving inspection, quality or the warehouse?
Either can run it, as long as the inspector has the current drawing and PO, the authority to hold nonconforming material, and a result that posts to the same ERP status a planner sees. What matters most is keeping the inspection decision separate from whoever is under pressure to release stock to the line.
Do we need to inspect every shipment from a qualified supplier?
You can stop inspecting every shipment once a supplier with a sustained record of clean lots and an accepted process earns reduced, skip-lot, or dock-to-stock status under your own sampling plan. That status applies per part and per supplier, and a new nonconformance should suspend it until the supplier requalifies.
How is receiving inspection different from source inspection?
Receiving inspection happens at your dock after the shipment arrives. Source inspection happens at the supplier's site before the shipment leaves. Teams usually reserve it for parts that are costly or bulky to ship back, or where finding a defect at your dock would be too late for the build.
Can a receiving inspector waive a nonconformance to keep the line running?
Only through a documented deviation or waiver, approved by someone with the authority to accept the risk and recorded against the part number and lot. That record limits the waiver to that lot, so the next shipment with the same gap is inspected and held again.
If receiving inspectors spend more time chasing missing certificates than checking parts, talk to our team about how Scout Agent chases certificates and test reports with suppliers while the lot stays on hold.
This article is general information, not legal or tax advice. Check how the rules apply to your business with your legal or tax advisor.
Sources (11)
- SAE AS9100D, Quality Management Systems – Requirements for Aviation, Space, and Defense Organizations
- ISO 9001, Quality management systems — Requirements
- ISO 13485:2016, Medical devices — Quality management systems — Requirements for regulatory purposes
- FDA, Quality Management System Regulation (QMSR)
- UCC § 2-513, Buyer's Right to Inspection of Goods (Cornell LII)
- UCC § 2-606, What Constitutes Acceptance of Goods (Cornell LII)
- UCC § 2-607, Effect of Acceptance; Notice of Breach (Cornell LII)
- § 377 HGB, Untersuchungs- und Rügepflicht beim Handelskauf
- United Nations Convention on Contracts for the International Sale of Goods (UNCITRAL), Arts. 1, 38, 39
- ISO 2859-1:2026, Sampling procedures for inspection by attributes — Part 1 (third edition)
- ANSI/ASQ Z1.4-2003 (R2018), Sampling Procedures and Tables for Inspection by Attributes