First article inspection services provide formal verification to confirm that a manufacturer can produce a PCBA in accordance with the customer’s engineering requirements before regular production begins. First article inspection (FAI) is most common in aerospace, defense, medical, electronics, and other industries where accuracy, material compliance, traceability, and process control affect product acceptance.
At its core, FAI compares the first completed production part against the approved drawing, specifications, bill of materials, purchase order requirements, and any applicable standards. The word first, however, does not always mean the first piece ever made. It usually means the first part produced from a new or changed process, tool, supplier, material, program, revision, or manufacturing location.
Depending on the assembly requirements, first article inspection services may include visual inspection, component verification, solder joint review, polarity checks, documentation review, and other customer-specified quality checks.
Why First Article Inspection Matters for PCBAs
PCBAs can fail for reasons that are not obvious from a completed board. An incorrect component value, reversed polarity mark, outdated revision, solder defect, blocked inspection point, or unclear build note can pass through production if the first build is not checked against the approved requirements. First-article inspection services reduce that risk by establishing a documented review point before repeat production begins.
FAI is most useful when a PCBA is new, has changed, or requires customer approval before release. The first completed assembly, or another customer-specified quantity, is inspected to confirm that the board matches the approved build requirements before more boards are produced.
Having this early checkpoint is important to prevent PCBA defects from repeating across the lot. If placement data, polarity orientation, soldering approach, workmanship criteria, or documentation is incorrect on the first board, the same issue can affect every subsequent board. FAI helps catch those problems while corrections are still limited to the first build rather than a larger order.
The inspection record also supports traceability by showing what was reviewed, which requirements applied, and whether the first build met the required standard. For OEMs working with complex or quality-sensitive PCBAs, this documentation helps with internal quality reviews, customer audits, corrective actions, and release approvals.
What is Included in First Article Inspection Services
The scope of a first article inspection depends on the assembly, customer requirements, and acceptance criteria. For PCBAs, the inspection usually covers both the physical build and the records needed to prove the board was assembled to the correct revision and requirements.
- Document verification — The assembled board is compared against the latest approved files, which may include the bill of materials, assembly drawing, Gerber data, pick-and-place files, revision notes, specifications, and purchase order requirements. This helps identify mismatched revisions, outdated files, substitute components, or unclear build notes before the build continues.
- Component placement verification — Inspectors confirm that the correct components are installed in the correct locations. For PCBAs, this can include reference designators, component values, package types, quantities, and any customer-specified parts.
- Polarity and orientation review— Diodes, LEDs, electrolytic capacitors, ICs, connectors, and other polarized components must face the correct direction. A board can look complete and still fail functionally if one orientation-sensitive part is placed incorrectly.
- Solder quality inspection — The board is reviewed for solder defects such as bridging, insufficient solder, lifted leads, tombstoning, cold joints, voiding concerns where applicable, and poor wetting. Depending on the assembly type, inspection may include visual review, magnification, automated optical inspection, X-ray inspection for hidden joints, or other inspection methods.
- Mechanical and fit requirement inspection — Inspection may confirm board dimensions, connector locations, mounting holes, standoffs, hardware, labels, jumpers, shields, heat sinks, or other mechanical requirements. This is especially relevant when the board must fit into a housing, enclosure, panel, or larger electronic assembly.
- Workmanship standards — Inspection is typically tied to defined workmanship criteria, such as IPC requirements when they are part of the contract or quality expectations.
- Documentation and traceability review— Lot codes, date codes, material records, inspection records, and required certifications may be checked as part of the inspection package. For regulated or quality-sensitive industries, these records are often required for traceability, audit requirements, and later review if a defect investigation is needed.
If the first article does not meet the requirements, the issue is recorded, corrected, and reviewed before the build proceeds. That may mean replacing an incorrect component, correcting placement data, updating documentation, adjusting the assembly process, or obtaining customer approval for a clarification or deviation.
First Article Inspection Support from Siemens Manufacturing
Siemens Manufacturing helps OEMs bring new and revised PCBAs into production with greater confidence. Our first-article inspection support links build details to the documentation, inspection results, and quality checks required before repeat production begins. FAI is used as a production control point to catch issues early, reduce avoidable rework, and provide customers with a clearer path from first build to approved production.