What is the First Article Inspection (FAI)?
When Should a First Article Inspection Be Performed?
Types of First Article Inspection
What is Measured in a First Article Inspection?
What is Not Measured in a First Article Inspection?
How Many Pieces Are Required for a First Article Inspection?
How Should You Prepare for a First Article Inspection?
What is Material Verification in FAI and Why Does It Matter?
What Happens During a First Article Inspection?
When Might a First Article Inspection Be Unnecessary?
What Should an FAI Inspection Plan Include?
Industries Using FAI and Applications
What is the First Article Inspection (FAI)?
First article inspection (FAI) is a formal verification process conducted on a production-representative sample from the first production run—not necessarily the very first unit—to ensure it fully complies with customer specifications, engineering drawings, and purchase order quality requirements. As a structured first article inspection process, it systematically validates that manufacturing outputs align with documented design intent before full-rate production begins.
This procedure is also commonly referred to as first piece inspection, 1st article inspection, or first article inspections, depending on the industry. First article inspection services often include preparing first article inspection forms, conducting FAI inspection, and providing detailed documentation to demonstrate compliance with ISO, AS9100, or customer-specific standards.
To streamline the process, many manufacturers now leverage first article inspection software, which automates data collection, ensures accurate measurement logging, and maintains characteristic accountability. By verifying each design and process detail through FAI, companies gain objective records, clear accountability, and traceable evidence of conformance before full-rate production.
Reference documents typically include engineering drawings/CAD files (DPD), bill of materials (BOM), purchase orders (PO), and applicable technical specifications. Measurement results are recorded with traceable gages, documented tolerances, and measurement units. FAI focuses on process verification, not full process capability, ensuring that the production setup consistently produces conforming parts.
Benefits of First Article Inspection (FAI)
Implementing first article inspection offers significant quality, cost, and compliance advantages. Key benefits include:
- Reduce scrap and rework – Detect dimensional, material, and functional deviations early in the production run.
- Validate manufacturing processes – Confirm setups and special processes (e.g., heat treatment, anodizing) meet specifications.
- Ensure regulatory and customer compliance – Support standards such as AS9102, ISO 13485, and contract requirements.
- Provide full traceability – Record part numbers, materials, and characteristics in a FAI report or FAIR, linked to ballooned drawings and gage IDs.
- Accelerate approvals – Enable faster customer or source-inspector acceptance and release to production.Confirm measurement system integrity – Verify calibration status, measurement resolution, and measurement system analysis requirements.
- Identify design ambiguities – Provide early feedback for DFM improvements before mass production.
- Mitigate supply chain risks – Ensure quality consistency when changing materials, tooling, suppliers, or manufacturing locations.
- Support audits and long-term records – Maintain multi-decade traceable records, critical for aerospace and regulated industries.
- Enable digital thread integration – Use CAD-integrated ballooning, automated data capture, and searchable process flow diagrams for efficient documentation.
By conducting FAI inspections and producing detailed first article inspection reports, manufacturers can prevent costly errors, strengthen customer confidence, and ensure a smooth transition from prototype to full-scale production.
When Should a First Article Inspection Be Performed?
First article inspection (FAI) should be conducted whenever a manufacturing process could impact the fit, form, or function of a part. Typical scenarios include:
- Introducing a new product or first article
- After design revisions or engineering changes
- Selecting a new supplier or transferring manufacturing to a new facility
- Changing tooling, machinery, or production equipment
- Switching raw material sources
- Resuming production after a long pause
- Meeting customer or regulatory requirements
The number of parts inspected during FAI can range from 1–5 production pieces, depending on the first article testing requirements, with larger sample sizes used for higher-risk components.
In cases where only certain features or processes have changed, a Delta FAI (partial first article inspection) is performed to verify the affected characteristics while ensuring that unchanged features remain conforming. For full verification of all design characteristics, a Full FAI is recommended.
Timing is critical: in regulated industries, FAI typically occurs after the first production run has started, with samples selected randomly from the initial batch to identify potential scale-up issues. Aerospace and automotive programs often conduct FAI early—when approximately 1–10% of the production order is complete—to detect systemic problems before costs and schedules escalate.
By performing FAI inspections at these key points, manufacturers can confirm that the production process consistently produces parts meeting design intent, generate a reliable first article inspection report (FAIR), and reduce downstream quality risks in subsequent production lots.
Types of First Article Inspection
First article inspection (FAI) can be performed in several ways, depending on the scope of change, risk, and product complexity. Understanding these types helps manufacturers ensure compliance, maintain quality, and streamline first article testing.
1. Full (Standard) FAI
A Full FAI is a comprehensive verification of all design characteristics for a new part, new supplier, or after long production gaps (often ≥2 years). It ensures that every dimension, material, functional, and visual requirement is measured and documented in the first article inspection report (FAIR/FAI report).
Full FAI establishes the production baseline for future inspections, including Partial or Delta FAI, and is often required by aerospace standards (AS9102), automotive PPAP, and medical ISO 13485. The FAI inspection captures part number accountability, material certification, special processes, GD&T measurements, and gage traceability, often recorded using first article inspection forms or first article inspection software.
2. Partial / Delta FAI
A Partial FAI targets only the characteristics or processes affected by design changes, tooling modifications, or material updates, ensuring that unchanged features remain compliant.
A Delta FAI is a type of Partial FAI explicitly linked to an engineering change notice (ECN). The FAIR documents measurement results for modified features, includes delta tables comparing old vs new specifications, and maintains traceability to the original first article inspection report. This approach reduces measurement time while still verifying product conformity.
3. Piece-Part / Component FAI
A Piece-Part or Component FAI focuses on an individual part, often a critical building block for assemblies. It includes raw material verification (mill certificates, heat/lot numbers), dimensional measurements, and special process documentation (e.g., plating, anodizing) in the first article inspection report. This type of first piece inspection ensures that components meet design specifications before integration into assemblies.
4. Assembly FAI
An Assembly FAI verifies completed assemblies against their Bill of Materials (BOM) and interfaces. AS9102 Form 1 links subcomponents to their respective FAIRs, maintaining vertical traceability and accountability. FAI inspection at the assembly level includes functional checks, marking verification, and interface confirmation, preserving the digital thread from subcomponents to the final assembly.
5. Interim FAI
An Interim FAI is a focused, time-boxed inspection performed between milestones, such as after tool refurbishment, process relocation, or prior to a Full FAI. It targets high-risk critical-to-quality (CTQ) characteristics and special processes, confirming stability while the broader first article inspection report is prepared.
Tools and Documentation: All types of FAI can leverage first article inspection software and standardized 1st article inspection forms to record measurements efficiently, maintain characteristic accountability, and generate compliant first article inspection reports for customer or regulatory review.
What is Measured in a First Article Inspection?
A first article inspection (FAI) verifies that a part or assembly meets all design, functional, and material requirements. Measurements are documented in a first article inspection report (FAIR), which can also serve as a first piece inspection report, forming the basis of first article inspections and first article testing in manufacturing.
Key Measurements
- Dimensional Features: Linear sizes, diameters, profiles, and positions per GD&T (ANSI Y14.5) verified against drawings or CAD/DPD models.
- Material Properties: Hardness, tensile strength, chemical composition, and other specified attributes.
- Functional Verification: Fit, form, operation, and assembly checks.
- Surface and Visual Attributes: Surface finish, markings, labeling, and coatings.
- Special Processes: Heat treatment, plating, anodizing, or welding, verified via certificates or process records.
Documentation and Traceability
Each measurement is recorded in the FAI report, including method, Gage ID, calibration status, and conformance. Non-conformances are tracked with NCR references. Grouped features may use min/max statistics, while first article inspection software can automate data collection and link measurements to CAD models.
This structured approach ensures FAI in manufacturing provides traceable proof of conformance, accountability for all characteristics, and helps define FAI clearly for suppliers, customers, and auditors.
What is Not Measured in a First Article Inspection?
A first article inspection (FAI) does not measure certain elements that do not directly affect function or design verification. These include:
- Theoretical or boxed dimensions: Basic dimensions that feed GD&T controls but carry no direct tolerance.
- Process capability (Cp/Cpk): Run-at-rate or statistical process studies are not part of standard FAI unless specifically required.
- Visual inspection only: Cosmetic or aesthetic checks are included only if stated in customer requirements.
- Golden samples: Pre-approved parts cannot substitute for first article inspection services, as they may not represent actual production conditions.
FAI serves as a conformity snapshot and a process validation step, ensuring dimensional, material, and functional compliance. It is not a guarantee of defect-free production, and relying solely on golden samples or unmeasured features can mask process or measurement gaps. Proper execution of FAI inspection ensures traceable results in the first article inspection report (FAIR) and supports accountability for all characteristics.
How Many Pieces Are Required for a First Article Inspection?
A first article inspection (FAI) typically uses 1–5 production-representative pieces, with 3–5 being common for confidence. In cases of rare, expensive, or high-risk components, only 1 piece may be inspected. All samples must reflect normal production conditions and be randomly selected from the first run.
Certain industries—especially aerospace or regulated sectors—may require specific counts or inspect parts when 1–10% of an order is produced to catch scaling issues early. Customers may also verify a subset to ensure measurement alignment. Any discrepancies can trigger adjustments to tooling, processes, or drawings.
The goal is to balance cost, schedule, and assurance: inspect enough parts to confirm repeatability without delaying production, while maintaining the integrity of the first article inspection report (FAIR) and supporting downstream approval.
How Should You Prepare for a First Article Inspection?
Proper preparation is critical to ensure a first article inspection (FAI) is accurate, traceable, and fully compliant. The preparation process consolidates requirements, plans the inspection, confirms metrology capabilities, and readies production-representative samples. The following detailed steps outline a comprehensive approach:
1.Define FAI scope and triggers
Identify whether a Full FAI, Partial FAI, or Delta FAI is required. This determination is based on the potential impact of changes to fit, form, function, material, or processes. Clarifying the scope ensures that the first article inspection services are properly aligned with risk and compliance requirements.
2.Assemble the technical data package
Collect all relevant technical documentation, including engineering drawings or CAD (DPD), BOM, specifications, purchase order clauses, previous first article inspection reports (FAIRs), and any customer-provided templates. Having a complete dataset ensures that every required characteristic can be verified and documented.
3.Balloon the drawing and pre-build the characteristics table
Assign unique balloon IDs to each design requirement on the drawing. Create a comprehensive characteristics table that maps each feature to its tolerance, units, measurement method, and expected result. This forms the basis for the first article inspection checklist and ensures clear traceability of all characteristics during the FAI process.
4.Plan acceptance criteria and sampling
Define the type of inspection for each feature (attribute vs. variable), determine the sample size, and schedule the timing—typically from the first production batch. The plan ensures that the first piece inspection or 1st article inspection is truly production-representative and that the selected parts provide meaningful verification of the manufacturing process.
5.Verify gage calibration and measurement environment
Confirm that all inspection tools and equipment are calibrated and traceable, including calibration due dates, measurement resolution (~1/10 of tolerance), and environmental conditions (temperature, humidity, vibration). Proper setup ensures that the FAI inspection results are accurate and defensible.
6.Run production under final conditions
Manufacture the FAI samples using final materials, tooling, and process parameters. Tag and segregate the inspected pieces for clarity. This step ensures that the first article inspection captures a realistic snapshot of the production process and allows any deviations to be identified early.
7.Prepare first article inspection forms and reports
Stage all required documentation, including 1st article inspection forms, first article inspection software outputs, and AS9102 Forms 1–3 (or customer-specific equivalents). Assign sign-off responsibilities for approvals. Proper documentation facilitates first article inspections and ensures a complete FAI report that records all measured and verified characteristics.
8.Coordinate stakeholders and approvals
Communicate and align expectations among engineers, quality assurance, and buyers regarding data collection, non-conformance handling, approvals, and retention. This ensures that first article inspection services are performed efficiently and in compliance with internal and customer quality requirements.
By following these steps, manufacturers can ensure that the first article inspection is thorough, documented, and delivers actionable data. This preparation supports process validation, reduces risk, and provides a foundation for traceable approvals and continuous improvement.
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What is Material Verification in FAI and Why Does It Matter?
Material verification is a critical step in first article inspection (FAI) and first article testing, ensuring that raw materials meet all specified requirements and maintain full traceability. This process links each material lot to the specific FAI parts and ultimately supports a complete first article inspection report (FAIR), reinforcing the integrity of the FAI in manufacturing.
Material verification confirms that raw materials conform to the specified grade or standard, typically using Certificates of Conformance (CoC) and, where required, chemical and mechanical tests. Heat or lot traceability is strictly maintained to ensure that each record ties directly to the material used in the FAI sample and the corresponding work order documented on AS9102 Form 2.
Key CoC fields often include:
- Mill or supplier name
- Material grade and reference standard (e.g., ASTM, ISO)
- Form and dimensions
- Heat or lot number
- Quantity covered
- Actual chemical composition
- Mechanical properties (yield strength, tensile, hardness)
- Country of origin
- Material verification applies across multiple domains:
Metals: hardness, tensile, and chemical composition verification
Plastics: resin specifications, certifications, and compliance with standards
Electronics: RoHS compliance, lead-free declarations
Special processes: plating adhesion, hardness, or other controlled treatments
By thoroughly verifying materials, manufacturers prevent substitutions, ensure compliance during audits, and maintain a clear digital thread from raw material to final first article inspection results. Strong material verification enhances confidence in production, supports customer and regulatory audits, and strengthens the reliability and traceability of the FAI report.
What Happens During a First Article Inspection?
During a first article inspection (FAI), an authorized inspector measures and verifies all specified characteristics on production-representative samples. These measurements are captured in the first article inspection report (FAIR), which documents conformity against engineering drawings, purchase order (PO) requirements, and contract specifications. The process ensures traceability, quality, and process validation before full-scale production.
Key Activities in FAI
1.Measurement of Characteristics
Inspectors measure dimensional features, profiles, positions per GD&T, material properties, surface finish, markings, labeling, and special processes like heat treatment or plating. Calibrated tools—including fixed or portable CMMs, 3D scanners, micrometers, calipers, and multimeters—are used. All results are logged, either manually on first article inspection forms or digitally via first article inspection software, ensuring clear characteristic accountability.
2.Data Recording and Documentation
Each measurement captures the requirement, actual value, measurement method, Gage ID, calibration status, and pass/fail. Non-conformances trigger NCRs and corrective actions, which are documented in the FAIR. Failing results may require a Delta FAI or rework before production continues.
3.Stages of FAI
The first article inspection workflow typically includes:
- Defining FAI scope (Full, Partial, or Delta).
- Conducting the first production run under final manufacturing conditions.
- Randomly selecting samples from the first batch.
- Executing measurements and functional checks per the inspection plan.
- Recording results and documenting non-conformances.
- Compiling the FAIR (Forms 1–3 plus ballooned drawing).
- Internal review and customer/source-inspector approval.
- Release to production with proper record retention.
4.Creating an Effective FAI Checklist
A robust checklist converts design and contract requirements into verifiable actions:
Confirm triggers and scope of FAI.
List all design characteristics with balloon IDs.
Specify tolerances and units.
Define measurement methods, Gage IDs, and calibration due dates.
Set acceptance criteria (attribute vs. variable).
Include raw material and special process verification.
Define sample count and inspection timing.
Include non-conformance handling and disposition workflow.
Record approval signatures and data-retention details.
5.Material Verification During FAI
Raw materials are verified via mill certificates of conformance (CoC) and, when necessary, chemical and mechanical tests. Traceability is maintained for heat/lot numbers, linking materials to the FAIR. Special processes, such as plating or coating, are verified per specifications.
6.Equipment Condition and Calibration
Inspectors confirm all gages are calibrated, with resolution roughly 1/10 of tolerance, and ensure environmental conditions meet requirements. Gage IDs and calibration due dates are recorded for traceability.
7.Assessing Manufacturing or Assembly Process
The process is validated to confirm that tooling, machines, and operator instructions produce conforming parts. Critical steps, special processes, and fixture setups are observed. Deviations are documented, and corrective actions implemented before production continues.
8.Inspecting Finished Parts or Assemblies
Parts are inspected according to the ballooned drawing or CAD/DPD reference. Variable dimensions, attribute checks, functional tests, and markings are verified. Non-conforming results are flagged with NCRs, and supporting evidence (photos, plots, data files) is attached to the FAIR.
9.Documenting Results and Recommendations
The FAIR consolidates all measurement results, CoCs, special process certificates, and NCR documentation. Any design or process adjustments are recommended, and approvals obtained from customer or source inspectors. Records are archived per retention requirements.
10.Integrating FAI Into Quality Control
FAI outputs reinforce ongoing quality control by linking measured characteristics to in-process checks and SPC, sustaining gage traceability, institutionalizing changes via ECN/ECR, conducting periodic partial FAIs after major changes, and reviewing FAIR data for lessons learned and training purposes.
When Might a First Article Inspection Be Unnecessary?
A first article inspection (FAI) may not always be required, particularly for low-risk or low-cost parts, or mature products from trusted suppliers with stable processes and robust quality systems. In such cases, enhanced in-process inspections (DUPRO) or final inspections may provide sufficient assurance.
Some clients may substitute an FAI with a pilot production run—tens to hundreds of units—to demonstrate process capability. However, in regulated industries such as aerospace or defense, first article inspections are typically mandatory by contract, and waivers are rarely allowed.
If a waiver is granted, it should be explicitly documented along with a risk mitigation plan, including alternative verification methods like enhanced in-process checks or short-interval audits. Keep in mind that skipping an FAI increases the risk of scale-up defects, which can propagate through the supply chain, increase rework costs, and threaten delivery schedules.
What Should an FAI Inspection Plan Include?
An effective first article inspection (FAI) plan ensures every design requirement is traceable to a verifiable check, using consistent methods, calibrated gages, tolerances, and clear acceptance criteria. Key elements include:
- Ballooned Drawings and Characteristic IDs – Assign unique balloon IDs to all dimensions, notes, and GD&T callouts, linking each to the specification and tolerance.
- Characteristics Table – Map each balloon ID to its specification, tolerance, units, measurement method, Gage ID, and calibration due date. This table forms the backbone of the first article inspection report (FAIR) or first piece inspection report.
- Sample Size and Timing – Define how many parts from the first production run will be inspected, ensuring the samples are production-representative and randomly selected. Include timing for first article inspections within the production schedule.
- Attribute vs Variable Checks – Clearly differentiate checks for pass/fail attributes versus quantitative variable measurements, ensuring proper analysis and reporting.
- Special Process and Functional Test Plans – Include verification for heat treatment, plating, coating, or other processes, plus any functional or assembly tests required by the engineering drawing or purchase order.
- Nonconformance Disposition Workflow – Define how NCRs (non-conformance reports) are documented, reviewed, and resolved, including corrective actions and approvals.
- Integration with First Article Inspection Software – Where available, automate data capture, traceability, and report generation using first article inspection software, reducing manual errors and improving compliance with AS9102 or customer requirements.
- Signatures and Data Retention – Include approval blocks and retention identifiers so audits can verify completeness years later. This ensures that your FAI inspection plan fully supports quality control, traceability, and customer/source approvals.
Who is Responsible for FAI?
The supplier or manufacturer is primarily responsible for executing the first article inspection (FAI). This includes performing all FAI inspections, collecting measurements, and generating the first article inspection report (FAIR) or first piece inspection report.
Execution can be carried out by:
- In-house QA or engineering teams with calibrated metrology tools and CMMs (fixed or portable)
- An authorized second-party inspector or third-party inspection service specializing in first article inspection services
- Customers or source inspectors who may witness or approve the FAI results
In regulated industries such as aerospace, medical devices, and defense, AS9102-compliant first article inspection forms are often mandatory. These forms may flow down to sub-tier processors for special processes verification.
Clear documentation of roles, responsibilities, and access to first article inspection software ensures accountability, maintains characteristic traceability, and aligns FAI in manufacturing with customer expectations.
Industries Using FAI and Applications
First article inspection (FAI) is essential in industries where precision, safety, and traceability are critical. First article inspections and first article inspection reports (FAIRs) ensure that initial production parts meet specifications before full-scale manufacturing.
Aerospace & Defense
Aerospace programs require AS9102-compliant first article inspection services for safety-critical components. Inspectors verify dimensional, material, and functional characteristics, and suppliers may flow down requirements to sub-tiers. Source inspectors frequently witness the FAI process. The approved FAIR establishes traceability, supports long-term data retention, and ensures conformity to ASME Y14.41 model-based definitions.
Automotive
In automotive manufacturing, FAI is embedded within APQP and PPAP processes. While first article inspections confirm that initial parts meet design intent, the broader PPAP framework demonstrates sustained production capability. First piece inspection reports document all measured characteristics, from GD&T dimensions to material verification, providing traceable evidence that supports first article testing. The integration of FAI in manufacturing with PPAP reduces risk and accelerates customer approvals.
Medical Devices
Medical device manufacturers use FAI under ISO 13485 to verify materials, functional features, and regulatory-critical characteristics. First article inspection services provide evidence that each first piece meets design specifications, linking raw materials and component testing to the final FAI report. This traceability ensures compliance with regulatory audits and strengthens patient safety.
Electronics & Electrical
For electronics, FAI confirms connector interfaces, PCB assembly tolerances, and functional tests. Engineers capture data on each first piece, ensuring that electrical performance and assembly characteristics meet contract requirements. All results are recorded in first article inspection forms.
Precision Machining
High-precision components rely on first article inspection to validate tight GD&T tolerances, material properties, and functional characteristics. Component inspections may be supported by first article testing or first piece inspections, which serve as the reference for all subsequent production lots.
Plastics & Injection Molding
Injection-molded parts undergo first article inspections to validate tooling, resin changes, and process stability. Measurement of dimensional and surface characteristics is recorded in first article inspection reports, linking material properties to part performance.
Industrial & Energy Equipment
FAI ensures critical rotating components, bearings, and actuators meet functional and material requirements. First-article bearing inspection services provide detailed first article testing, establishing baseline quality before assembly and integration. Traceable first article inspection reports document all verified features, enabling compliance with industrial standards.
How Does First Article Inspection Compare with PPAP?
First article inspection (FAI) and Production Part Approval Process (PPAP) serve complementary roles in manufacturing quality assurance but differ in scope, sample size, and objectives. FAI focuses on verifying the conformance of initial production pieces to engineering specifications, while PPAP evaluates the entire production process to ensure it can consistently produce compliant parts at volume.
Factor | FAI | PPAP |
Primary goal | Conformity of first article | Production-process approval at rate |
Sample size | 1–5 pieces (first article) | Tens–hundreds of pieces |
Scope | Dimensional, material, functional checks per design | Dimensional/material/functional + control plans, PFMEA, process flows, gage R&R, capability studies |
Core output | FAIR (AS9102 Forms 1–3 + supporting evidence) | PPAP submission package (up to 18 elements) |
Typical use | Aerospace, medical devices, precision machining | Automotive; increasingly adapted in aerospace |
First article inspections concentrate on the measurement and verification of initial parts using calibrated equipment, capturing results in a first article inspection report (FAIR). This includes dimensional features, material properties, functional tests, and any special processes. Sample sizes are small—typically 1–5 parts—to represent normal production conditions. FAI also supports traceability, characteristic accountability, and documentation for regulatory compliance.
In contrast, PPAP extends beyond the initial part to assess production readiness, process stability, and capability at the quoted rate. It incorporates control plans, PFMEA, process flows, gage R&R studies, and capability analysis across multiple production samples (tens to hundreds). While FAI validates readiness and part conformance, PPAP demonstrates sustained production capability, ensuring that the system can reliably produce quality parts at full volume.
Ultimately, FAI is often a subset of PPAP: it provides the baseline verification of the first piece, while PPAP provides the broader approval of the manufacturing process. Both are critical for reducing risk, protecting the supply chain, and ensuring compliance with customer and regulatory requirements.
First Article Inspection (FAI) FAQ
1. How do you create a first article inspection report (FAIR)?
A FAIR is created by documenting all measured characteristics of the first article using calibrated tools, linking ballooned drawings to specifications, recording materials and special processes, and noting any non-conformances. First article inspection software can automate data capture and reporting.
2. What is the difference between FAI and FAIR?
FAI is the inspection process of verifying first article conformance, while FAIR (First Article Inspection Report) is the documented evidence of that inspection, including measurements, material verification, and compliance results.
3. What are the common limitations and challenges of first article inspection?
Challenges include limited sample size, ensuring representative production conditions, coordinating multiple suppliers, managing complex assemblies, and capturing all relevant characteristics in the first article inspection report.
4. How do you select a first article inspection service provider?
Choose a provider with experience in your industry, ISO/AS9100 compliance, skilled inspectors, access to FAI inspection software, and the ability to generate complete first article inspection reports (FAIRs) for traceability.
5. What happens if a component passes or fails the first article inspection?
Passing first article inspections confirms production readiness and allows full-scale manufacturing. Failing components trigger corrective actions, updates to tooling or processes, and may require a Delta FAI or re-inspection before production continues.
6. What challenges arise when adapting FAI to small-scale or low-volume production?
Small runs make representative sampling difficult, increase inspection costs per part, and may limit the ability to fully verify all characteristics. Careful planning and selective first article inspections help balance risk and efficiency.