Moving a new or modified component into full production involves more than confirming that one part looks right. Manufacturers need reliable evidence that the planned materials, equipment, tooling, instructions, and inspection methods can produce a part that meets applicable design requirements. First article inspection, commonly called FAI, provides a structured way to perform that verification before production moves forward. For manufacturers and suppliers navigating tight tolerances and detailed customer requirements, FAI can serve as an integral part of quality planning and production readiness.
Located in Rochester, NY, QES Solutions offers precision measurement and first article inspection services for manufacturers and suppliers throughout North America. If your team needs dimensional inspection support before a production run, contact our experienced team.
What Is First Article Inspection?
First article inspection is a documented verification process used to determine whether a manufacturing process has produced a part that conforms to specified design requirements. Despite the name, the inspected component is not necessarily the literal first piece to come off a machine. It may instead be a representative item from the first production run.
An FAI is more comprehensive than simply checking a handful of critical dimensions. Depending on applicable requirements, the inspection and supporting documentation may address dimensions, materials, processes, specifications, drawing notes, and other characteristics identified by engineering documentation or the customer.
In other words, the question is not merely, “Is this particular part acceptable?” The broader question is, “Has the planned production process demonstrated that it can produce a part according to the specified requirements?”
Why FAI Matters Before Full Production
Discovering a discrepancy during an early production stage gives a manufacturer an opportunity to investigate it before larger quantities of parts are made. Finding the same problem after a significant production run can involve more material, inventory, inspection time, and coordination.
That makes FAI an important form of production validation. It can reveal discrepancies involving dimensions, manufacturing documentation, tooling, programming, or other elements of the production plan before they become embedded in a larger run.
FAI also creates documented measurement results that quality personnel, engineers, suppliers, and customers can review. This provides an objective reference for determining whether the inspected article conforms to the applicable requirements.
For companies working across complex supply chains, that documentation can be especially valuable. Manufacturers may be responsible not only for their own internal quality requirements but also for specifications established by customers, drawings, purchase orders, contracts, or industry standards.
When Is a First Article Inspection Required?
There is no universal rule requiring the same FAI process for every manufacturer or every component. Requirements depend on factors such as the industry, customer contract, purchase order, quality system, and applicable standard.
A first article inspection may be required or requested when:
- A new part enters production.
- A customer or purchase order specifically calls for an FAI.
- A design or engineering change affects the product.
- A manufacturing process, tooling setup, or production location changes in a way covered by customer or industry requirements.
- Production resumes under circumstances that trigger a new or partial FAI under the applicable specification.
Manufacturers should review the governing customer, contractual, and industry requirements rather than assuming that every situation follows an identical rule.
Aerospace provides one prominent example. SAE International’s AS9102C establishes requirements for performing and documenting FAI and states that its requirements complement rather than replace customer, statutory, and regulatory requirements. The current AS9102C revision was published in June 2023.
How the First Article Inspection Process Works
The exact workflow varies according to the part and governing requirements, but an effective FAI generally begins well before someone places a finished component on an inspection table.
1. Review the Requirements
Quality personnel first need to understand what must be verified. Relevant information can include engineering drawings, digital product definition data, specifications, purchase orders, customer requirements, material requirements, and manufacturing documentation.
This review establishes the basis for the inspection and identifies the characteristics that need documented verification.
2. Manufacture the Article Using the Planned Process
The article should represent the intended production process. That is central to the value of FAI: the goal is to evaluate the output of the planned manufacturing approach rather than a special component produced under unrelated conditions.
The process may involve production equipment, tooling, programs, fixtures, materials, operators, and instructions associated with the intended manufacturing method.
3. Inspect Applicable Characteristics
Next comes the manufacturing inspection itself. Inspectors compare applicable characteristics of the manufactured article against specified requirements.
Depending on part geometry and tolerances, measurement can involve several types of equipment. QES Solutions’ dimensional-measurement lab includes five high-accuracy coordinate measuring machines (CMMs), non-contact vision measurement systems, standard inspection and testing equipment, CAD-interface software, and multiple data-reporting options. Our company also provides dimensional and first article inspection among its precision measurement services.
CMM technology can be particularly useful for complex components because it allows precise measurement of geometric features and their locations. Readers interested in this technology can also explore our article on how CMMs improve manufacturing quality control.
4. Document the Results
FAI is not complete simply because measurements were taken. Results need to be documented according to the applicable requirements so that reviewers can connect inspected characteristics with the corresponding specifications and recorded results.
Good documentation creates traceability and gives relevant parties a structured record of what was examined and what the inspection found.
5. Address Nonconformities
If an inspection identifies a characteristic that does not meet its specified requirement, the discrepancy needs to be addressed through the manufacturer’s applicable quality procedures.
The appropriate response depends on the issue and governing requirements. A dimensional discrepancy, for example, could lead a team to investigate tooling, machining parameters, programming, fixturing, or another part of the production process. The important point is that FAI provides information before the organization simply assumes the process is ready for unrestricted production.
FAI as Part of Quality Planning
First article inspection works best when viewed as part of broader quality planning rather than as paperwork added at the end of manufacturing.
Engineering defines product requirements. Manufacturing develops the process for producing the component. Quality establishes methods for evaluating conformance. FAI brings information from those functions together by comparing actual production output with documented requirements.
This approach can also complement other manufacturing quality activities. QES Solutions’ precision measurement capabilities include machine process qualification studies, Production Part Approval Processes (PPAPs), injection mold qualification studies, capability studies, Gage R&R, surface roughness analysis, and other measurement services in addition to FAI.
The right combination depends on the product, process, industry, and customer. An FAI answers specific questions about whether the inspected production article conforms to applicable requirements; it should not automatically be treated as a substitute for every other form of process qualification or ongoing quality control.
What FAI Does — & Does Not — Tell You
A successful FAI provides documented evidence concerning an article produced using the specified production process. That is valuable evidence, but it should not be overstated.
FAI does not mean that every future component will automatically conform. Manufacturing processes remain subject to variation, equipment conditions, material differences, tooling wear, environmental factors, and other influences. Ongoing process controls and appropriate inspections remain important after the first article has been accepted.
This distinction is central to responsible production validation. FAI is an important checkpoint between planning and production, not a permanent guarantee about everything the process will produce in the future.
Building Confidence Before Production Moves Forward
A well-executed first article inspection connects engineering requirements with actual manufacturing results. By systematically inspecting and documenting an article produced through the intended process, manufacturers gain concrete information they can use when evaluating production readiness. FAI can also expose discrepancies at a stage when teams have an opportunity to investigate them before additional quantities are manufactured.
For manufacturers and suppliers in North America that need accurate dimensional data and professional inspection support, QES Solutions offers first article inspection and precision measurement capabilities from our dimensional measurement lab in Rochester, NY. We can support projects involving prototypes and production components with CMMs, vision measurement systems, inspection equipment, and multiple reporting options. To learn how QES Solutions can support your next FAI or other manufacturing inspection requirements, contact us today.