When a manufacturer reports that an electronic component failing in the field is linked to a specific lot, seeing the part number on the purchase order is not enough. The quality team needs to find which shipment that lot arrived with, how much of it is still in the warehouse and which production orders it was used in. If more than one lot has been received under the same part number, these records allow the investigation to be limited to the affected products only. If the lot information was not recorded at goods receipt, or was lost when the material was issued to production, the scope of suspect parts widens and more products may need to be quarantined.
The choice of supply channel directly affects this process. A document chain that can be verified back to the manufacturer makes it possible to investigate the origin of a received batch. Warehouse and production records, in turn, show where the same batch went within the company. For these two record chains to match, the requirements must be defined separately at the quotation, order and goods receipt stages.
How do authorized distributors, independent distributors and brokers work?
An authorized distributor distributes products under an agreement with the original component manufacturer (OCM). The scope of the authorization can vary by brand, product group and region. For this reason, a distributor being authorized for a particular brand does not mean that the same authorization covers all of the manufacturer’s product families or its sales in another region. Especially when a customer specification requires the use of an authorized source, the purchasing team should verify before ordering whether the quoted item falls within the scope of the authorization.
By stocking the products it sources from the manufacturer, an authorized distributor can respond to production and maintenance needs from local inventory. Technical teams that attend the manufacturer’s product training provide support in identifying the correct part number and product variant. Shipment records that can be traced back to the manufacturer make it easier to verify the origin of a part and reduce the risk of counterfeit parts. Commercial agreements with the manufacturer and volume purchasing can also offer the customer more favorable pricing options, depending on the product and order quantity.
The operational value of a direct relationship with the manufacturer becomes visible when a quality issue or product change arises. For example, when the plating of a connector terminal changes, the product or process change notification (PCN) published by the manufacturer can explain under which conditions the old and new versions apply. If a product is being discontinued, the product discontinuance notice (PDN) states the last order and last shipment dates. This information is used to plan how long existing stock will last and when an alternative needs to be qualified. The scope of warranty and return processes, however, depends on the relevant terms of sale of the manufacturer and the distributor.
An independent distributor supplies products outside the manufacturer’s authorized distribution agreement. It may hold its own inventory, keep source records and have technical inspections carried out. A broker, on the other hand, mostly finds existing stock holders for a specific demand and organizes the purchase on a transaction basis. Both models can offer an option for a part that has gone out of production or a product that cannot be found in the authorized channel. In such a purchase, the actual origin of the quoted batch and the records the supplier can provide matter more than the supplier’s trade name. A company reselling a product bought from an authorized channel is not considered to be acting as the manufacturer’s authorized distributor in that transaction.
SAE separates the requirements for reducing counterfeit risk according to how the channel operates. AS6496 addresses the authorized distribution channel, and AS6081A addresses independent distribution. If a supplier declares conformance or certification to one of these standards, which facility and activities the certificate covers should be examined separately. A quality management system certificate is not, on its own, a distribution authorization for a brand or an origin record for a specific lot.
AS9120B defines quality management system requirements for aviation, space and defense distributors. Within this framework, keeping records of a product’s origin and movements and establishing processes against counterfeit risk are part of the distributor’s quality management. AS6171, in turn, focuses on the test methods to be used when examining suspect electronic parts. SAE AS9120B standard
Which records build the traceability chain?
The manufacturer part number (MPN) identifies which product was ordered. The lot number shows which production batch the delivered product belongs to. The date code indicates the production period; parts carrying the same date code should not be assumed to belong to a single lot. If a product is tracked by serial number, the serial number allows each individual part to be traced.
At goods receipt, the purchase order, the dispatch document and the packaging label are compared. The full MPN, quantity, lot, date code and serial number, if any, are recorded. If a shipment contains more than one lot, each lot is associated with a separate inventory record. When a manufacturer reel is split or a partial shipment is made from a package, the new package ID is linked to the original package and the lot record. For example, when 500 pieces of a 2,000-piece reel are moved into a separate package, both the source reel and the quantity transferred to that package should be traceable through the new label.
Carrying the same lot information over to the work order or assembly record when material is issued to production creates the link between the supply chain and production records. When a nonconformance report arrives, the quality team can use these records to determine the quantity still on hand, the parts already issued to production and the affected end products. A legible label or barcode makes physical checks easier; the accuracy of the information on the label, however, depends on the records and documents supporting one another.
What does a manufacturer’s certificate of conformance verify?
A Certificate of Conformance (CoC) is a document in which the issuing organization declares that a specific product or shipment conforms to the stated requirements. Two elements determine how the document can be used: who issued it and which delivery it covers. A manufacturer CoC and a CoC issued by a distributor in its own name are declarations of different organizations. If the order requires a manufacturer CoC, whether the distributor’s own document meets this requirement should be clarified before purchase.
The goods receipt team compares the part number, quantity and any lot, serial or shipment reference on the CoC with the delivery. It then checks which technical specification or order requirement the document covers and whether it contains any exceptions. If a CoC does not include a lot number, it should be possible to establish through shipment or packaging records that the relevant batch falls within the document’s scope. A document belonging to another order or lot does not certify the delivered batch, even if it shows the correct manufacturer name and part number.
As a rule, a CoC is not a test report showing measured values. If measurement results for a specific batch are required, a suitable test report or certificate of analysis (CoA) is requested separately. RoHS and REACH declarations also meet a different need related to the relevant substance restrictions or notification obligations. For example, if a customer requires both a manufacturer CoC and a material declaration, the two documents should be specified as separate items in the quotation and order.
How is a batch of uncertain origin examined?
A remarked component may carry a code belonging to a higher temperature grade. A removed integrated circuit may be cleaned, repackaged and offered as a new product. Repackaging alone is not an indication of counterfeiting; distributors may properly split a manufacturer’s package for small-quantity deliveries. In such a case, the receiving team investigates how the new package relates to the original lot and whether the storage conditions have been maintained.
The first examination starts with a comparison of documents and packaging. The manufacturer name, part number and date code on the labels are checked. On the product itself, findings such as the position and style of the marking, signs of resurfacing, solder residue on the terminals, scratches or oxidation are examined. If there is an inconsistency, the batch is segregated before it is released to production; sample selection and further examination are planned according to the part’s function in the system and the findings at hand. In terms of quality management under AS9120, this step corresponds to identifying the suspect batch, segregating it from usable stock and recording the examination decision.
SAE AS6171 test methods can be used to build a risk-proportionate examination plan for suspect parts. X-ray helps compare internal structures such as the die and bond wires without opening the package; since legitimate design changes by the manufacturer can also cause differences in the image, it matters which revision the reference belongs to. XRF provides information on the elemental composition of the measured area. Electrical testing shows whether the selected parameters are met under defined conditions. When needed, opening the package to examine the die provides more detailed information, but this process destroys the sample examined.
Each method investigates a different suspicion. For example, an integrated circuit that passes a basic electrical test at room temperature has not, by that result, proven its conformance to the wide temperature range marked on it. A positive sample test result also does not mean that the entire lot has been examined or that a missing supply history has been verified. If there is more than one finding, the quality team evaluates them together before the batch is released and records the decision to accept, examine further or return.
How do physical stock and storage conditions affect delivery?
Physical stock can make delivery possible without waiting for the manufacturer’s new production lead time. For this, the part must have the correct MPN, be available in the requested quantity, be in a condition fit for shipment and not be allocated to another order. Knowing whether a quantity shown in a quotation is in the supplier’s own warehouse, at another distribution point or in the manufacturer’s future production plan changes the delivery plan, especially for items critical to a production line.
The usability of a part waiting in the warehouse depends on the product’s storage requirements. For a moisture sensitivity classified surface mount component, the integrity of the moisture barrier packaging and, where necessary, the condition of the humidity indicator card are checked. Once the packaging is opened, the time the part spends outside controlled packaging (floor life) is tracked. When a reel is split in two, repackaging the remaining parts does not by itself reset the previous exposure time. Repackaging or baking is carried out taking into account the part’s properties and the applicable process requirements. IPC/JEDEC J-STD-033 covers the handling, packing, storage and use conditions of such parts. The product preservation requirements of AS9120 cover the management of storage and handling conditions within the distributor’s quality processes. The detailed packaging and exposure controls to be applied to moisture sensitive components, on the other hand, are determined according to the relevant product and process requirements.
If a last-time buy is planned for a discontinued component, how that quantity will be stored is calculated in addition to the quantity needed over the service life. Tracking multiple lots, using materials with a shelf life in time and when the qualification of an alternative product will be completed directly affect the amount of stock to be held.
Supplier evaluation from quotation to goods receipt
A supplier evaluation can be carried out on a sample shipment file. The purchasing team reviews the quoted MPN, the source, the stock location and the delivery terms. The quality team, in turn, checks how the label, shipment record and CoC are linked to each other in the same sample. If the project requires a manufacturer CoC, lot-based separation, a specific date code range or special packaging, these requirements are clearly written at the quotation stage and carried over to the order. This way, the goods receipt decision is based on predefined criteria rather than assumptions made afterwards.
Navea Electronics’ supply model combines authorized distribution and physical stock for the brands it represents. The company also supplies products through different supply channels according to project needs. You can review the scope of representation by brand and region on our Brands page. For a specific component, you can send the full part number, the requested quantity and the target delivery date to the Navea Electronics team. If you have acceptance requirements such as a manufacturer CoC, lot tracking or special packaging, you can add them to your quotation request to clarify the document and packaging scope of the delivery before ordering.