How To Conduct A First Article Inspection: Steps, Checklist, And Best Practices

First Article is the first completed unit or part produced using the intended production process for evaluation. Conducting a thorough first article inspection (FAI) requires planning, structured measurement, documentation and clear acceptance criteria so production can proceed with confidence.

Below is a step-by-step approach designed for shop-floor and quality teams to run an efficient and defensible first article process that aligns with common industry expectations and standards.

Step 1 — Define Scope And Acceptance Criteria

Start by listing the part number, revision, applicable drawings, and contractual clauses that dictate first article expectations. Define which features are critical, the sampling rules (single unit vs. multiple samples), and permitted measurement uncertainty. If the customer requires an industry-standard format (for example AS9102), use that form as the submission template.

Step 2 — Prepare Production-Intent Setup

Set up the machine, tooling, fixture, and operators exactly as intended for production. Avoid using development or prototype fixtures. Confirm that CNC programs, heat-treatment cycles, and process parameters are finalized and recorded in setup sheets.

Step 3 — Build The First Article Unit

Manufacture the first completed unit under normal production conditions. Capture batch or lot identifiers for raw materials and purchased components and include these in the first article package to allow traceability back to material certificates.

Step 4 — Inspect And Measure

Use calibrated measurement systems. For critical features, consider coordinate measuring machines (CMMs), optical comparators, or appropriate functional test rigs. Record actual measured values, measurement method, instrument ID, and operator. Include photos of critical features and any nonconformances observed.

Step 5 — Compile Documentation

Assemble a complete first article report with the following items (common checklist):

• Part Identification: Part number, revision, serial or batch number.
• Material Certificates: Supplier certificates for raw materials and any heat-treatment or coating processes.
• Dimensional Data: Measurement records for every feature in scope, including gage IDs and calibration due dates.
• Process Records: Setup sheets, machine programs, and operator sign-offs.
• Nonconformance Records: Any deviations, disposition, and corrective action documentation.

Step 6 — Review And Approve

Perform a cross-functional review involving quality, manufacturing, and engineering. The approval should verify that all required evidence exists and that measurement results meet acceptance criteria. If the part fails, document root cause and corrective action, then re-run the first article sequence if changes affect compliance.

Common Pitfalls And How To Avoid Them

Several recurring problems undermine first article effectiveness. Avoid these by following these practices:

• Using Prototype Conditions: Always use production-intent tooling; prototype setups create false confidence.
• Insufficient Traceability: Keep material certificates and lot numbers with the first article package to allow investigation if issues later arise.
• Poor Measurement Documentation: Capture gage IDs and calibration data to ensure measurements are defensible.
• Inadequate Scope: Define which features are critical upfront so reviewers focus on the right risks.

Example Checklist For A First Article

• Part Info: Part number, drawing revision, manufacturing location listed.
• Material Certs: All raw material certificates included and cross-referenced.
• Dimensional Results: Feature-by-feature results with measurement methods recorded.
• Gage Calibration: Gage IDs and last calibration dates recorded.
• Process Records: Setup sheet, machine program revision, operator name.
• Photos: Images of critical features and any observed nonconformities.
• Approvals: Signatures from quality, manufacturing, and engineering.

When To Re-Run A First Article

Re-run the first article when changes affect the product’s form, fit, function, or traceability. Typical triggers include new tooling, change in material or heat treatment, significant drawing revision, or a supplier change for a critical purchased item. Documentation must show the cause, corrective steps and evidence that the revised process now produces conforming parts.

Best Practices For Scaling First Article Work

For organizations that perform many first articles, standardize templates, maintain a central repository of first article records, and include FAI milestones in ERP or PLM systems to ensure visibility. Automate data collection from CMMs and inspection systems where possible to reduce manual errors and accelerate approvals.

In short, the First Article inspection is a structured, evidence-based check that the production process produces parts that meet requirements. A disciplined FAI program—using production-intent setups, calibrated measurement, and complete documentation—reduces risk, speeds customer approvals, and prevents costly surprises in downstream production.