source inspection

Source inspection commonly refers to an inspection performed at the place where a product is made, processed, or prepared for delivery, rather than only at the receiving site or final point of use. In manufacturing and regulated supply chains, it is typically used to verify that materials, parts, assemblies, processes, records, or test results meet specified requirements before shipment, release, or the next operation.

The term includes inspections conducted at a supplier facility, subcontractor location, outside processor, or another point of origin. It may be performed by the supplier’s personnel, the customer, a designated representative, or an independent inspection party, depending on the contract, quality plan, or applicable workflow. It does not by itself mean that a product is accepted for all purposes, and it is not the same as a regulatory audit or a full quality system assessment.

How it is used in operations

In operational workflows, source inspection is often tied to purchase orders, work orders, traveler steps, hold points, or release gates. It can involve review of physical characteristics, documentation, certifications, test data, traceability records, special process evidence, packaging readiness, or labeling before material moves downstream.

• For incoming supply, it may occur at a supplier site before shipment.

• For in-process manufacturing, it may occur at a defined operation before the next routing step.

• For outsourced processing, it may confirm completion and conformity before parts return to the main facility.

The exact scope depends on the specification and inspection plan. Some source inspections are limited to selected characteristics or records, while others cover a broader release package.

What it is not

Source inspection is not the same as receiving inspection, which occurs after material arrives at the receiving organization. It is also different from first article inspection, which focuses on verifying that a production process can produce a part or assembly that meets defined design requirements, often for an initial run or change event. A source inspection may support those activities, but it does not automatically replace them.

Common confusion

Source inspection vs. receiving inspection: source inspection happens at the point of origin before shipment or release; receiving inspection happens after receipt.

Source inspection vs. in-process inspection: in-process inspection is a broader term for checks during production. Source inspection may be in-process if the source is an internal operation, but it more often refers to inspection at a supplier or external source.

Source inspection vs. audit: an audit evaluates a system, process, or compliance framework. Source inspection evaluates specific product, process output, or release evidence.

Manufacturing example

A customer may require source inspection of a machined aerospace component at the supplier’s facility before shipment, including dimensional results, material traceability, and completion of required process documentation.