First Article Inspection (FAI) is a documented verification that the first units built on production tooling, by production processes and trained operators, conform to every requirement on the drawing, specification, and bill of materials. In medical device manufacturing, FAI supplies objective evidence that a design has transferred into a repeatable process before commercial build begins.
What is First Article Inspection (FAI)?
FAI is a production process verification activity, not a design activity. The design must be frozen and the manufacturing route released before a first article means anything. The deliverable is a First Article Inspection Report (FAIR): a characteristic-by-characteristic record of what the drawing demanded and what the part measured.
“First article” does not mean the literal first part of the machine. It means a representative unit from the first production run, built the way every later unit will be built. Aerospace formalized this in SAE AS9102 (Revision C, 2023), and automotive formalized it through the Production Part Approval Process (PPAP). Medical devices have no dedicated FAI standard. The obligation sits inside ISO 13485:2016, which the FDA incorporated by reference into 21 CFR Part 820 when the Quality Management System Regulation (QMSR) took effect on February 2, 2026.
Why First Article Inspection (FAI) matters in medical device development
A device drawing can be correct, and the tooling still wrong. Mold shrinkage moves a sealing surface out of tolerance. A CNC program reads a datum differently than the designer intended. Neither shows up in design verification, which tested prototype parts.
The exposure is regulatory as well as physical. ISO 13485:2016 Clause 7.3.8 requires design outputs to be verified as suitable for manufacturing before they become production specifications. Auditors under QMSR, EU MDR 2017/745, and MDSAP read that clause as a request for evidence, and a signed FAIR is the clearest evidence available. Without one, a design transfer file is an assertion.
Cost drives the rest. An escape caught in the first article costs a tooling correction. Caught after process qualification, it costs revalidation. Caught after release, it costs an investigation, possible field action, and a CAPA.
The First Article Inspection (FAI) process
The mechanics are consistent across suppliers and device classes:
- Balloon the drawing. Number every dimension, tolerance, note, material callout, surface finish, and special process on the released revision. Unballooned notes get missed.
- Build production-intent units. Production tooling, released routings, trained operators, qualified material lots. Soft-tooled prototype parts do not qualify.
- Measure with calibrated equipment. ISO 13485:2016 Clause 7.6 governs monitoring and measuring equipment. A FAIR built on an uncalibrated gauge is worthless.
- Record actual values. Write the measured number, not “pass”. Variable data feeds capability studies later; attribute data does not.
- Account for everything else. Purchased components (Clause 7.4.3), special processes such as passivation or sterilization, labeling and packaging per 21 CFR 820.45, and any software or COTS items.
- Disposition and approve. Nonconformances take the normal MRB and CAPA route. The approved FAIR becomes the manufacturing baseline.
FAI is repeated, not done once. Triggers include any design change affecting form, fit, or function; new or refurbished tooling; a change of site, supplier, or process; and a long production lapse. Write them into the change control procedure required by Clause 7.3.9.
Common challenges and best practices
Teams most often confuse FAI with process validation. FAI proves one lot conforms to the specification. Process validation under ISO 13485:2016 Clause 7.5.6, executed as IQ, OQ, and PQ, proves the process keeps producing conforming output across normal variation. FAI feeds the sampling plan; it does not replace it.
The second failure mode is the pass/fail FAIR. A supplier ticks 240 boxes, all conforming, and the OEM learns nothing about how close any feature ran to its limit. Insist on measured values.
Third: balloon drift. The drawing revs, the balloon map does not, and the FAIR verifies a superseded design.
Fourth: supplier FAIRs that arrive, get filed, and are never read. The OEM owns the acceptance decision under Clause 7.4.3 regardless of who took the measurements.
What good looks like is unglamorous: the ballooned print, the PFMEA, and the control plan share the same characteristic numbers, and the FAIR goes to an auditor without a covering explanation.
How SJML helps with First Article Inspection (FAI)
SJML runs the first article activity inside an ISO 13485 quality system across precision metal, medical-grade plastics, PCBA, and system integration. NPI teams handle DfX and BOM review, PFMEA, and PPAP-style documentation ahead of the first production run. SMT lines use SPI, AOI, and X-ray inspection, and an SAP-integrated MES carries lot and component traceability from first article through routine build. Process validation (IQ/OQ/PQ) then follows the same characteristic set, so design transfer evidence stays consistent from tooling approval to commercial release.
Talk to SJML’s manufacturing team →
Frequently asked questions
No FDA regulation names FAI directly. Under the QMSR, effective February 2, 2026, 21 CFR Part 820 incorporates ISO 13485:2016 by reference, and Clause 7.3.8 requires verification that design outputs suit manufacturing before production begins. FAI is how most device manufacturers satisfy that clause. Auditors expect the evidence, not the acronym.
FAI verifies that units from the first production run conform to every drawing requirement. Process validation, under ISO 13485:2016 Clause 7.5.6 and executed as installation, operational, and performance qualification, shows the process reliably produces conforming output over time. FAI is a single-lot conformance check; validation is a statistical statement about the process.
Repeat FAI after any design change affecting form, fit, or function; after new, replaced, or refurbished tooling; after a change of manufacturing location, supplier, or process; and after a production lapse long enough that operator skill or tooling condition may have shifted. These triggers belong in the documented change control procedure.
AS9102 is an aerospace standard and carries no authority in device regulation. Many device manufacturers still borrow its three-form structure (part number, product, and characteristic accountability) because it is well tested and unambiguous. Using the forms is fine. Citing AS9102 as the compliance basis in a technical file is not.
Suppliers usually take the measurements and issue the FAIR. The legal manufacturer still owns acceptance. ISO 13485:2016 Clause 7.4.3 requires the organization to verify purchased product against specified purchase requirements, so the OEM must review, challenge, and approve the supplier’s report. Delegating measurement does not delegate responsibility.
Related terms
- Design Transfer
- Process Validation (IQ/OQ/PQ)
- Production Part Approval Process (PPAP)
- Process FMEA (PFMEA)
- Change Control
