How To Conduct A First Article Inspection: A Step-By-Step Checklist For Production

First Article Inspection A detailed inspection of an initial production unit to verify that manufacturing meets specifications. The procedure translates engineering drawings and acceptance criteria into verifiable inspection activities, creating baseline evidence before production ramps up.

This article provides a structured, practical walkthrough to conduct an effective FAI on the shop floor. The steps apply to single-piece first articles as well as to complex assemblies; adapt sample sizes and test scope to contract requirements and industry standards.

Step 1 — Review Requirements

Begin by collecting all requirements: the latest revision of drawings, specifications, material callouts, process standards, customer FAI requirements, and the purchase order. Identify critical-to-quality (CTQ) features, key characteristics, tolerance stacks, and any functional test criteria. Document which documents govern acceptance.

Step 2 — Prepare Inspection Plan And Tools

Create an inspection plan that maps drawing features to measurement methods (CMM, calipers, micrometers, gauges) and lists required process verifications (heat treat, coating thickness). Verify gage calibration status and prepare setup sheets, programs, and fixtures so the first article is produced under controlled conditions.

Step 3 — Produce The First Article Under Controlled Conditions

Run the part using finalized tooling, machine programs, and operator instructions. Record machine settings, tool IDs, operator name, lot numbers for consumables, and any in-process inspections. If subcontracted operations are involved (e.g., heat treat or plating), ensure their records and certificates are captured.

Step 4 — Perform Dimensional And Functional Inspections

Measure every drawing feature identified in the inspection plan. For dimensions use calibrated equipment and capture actuals; for materials, collect certificates of conformity or test reports; for coatings, record thickness and adhesion tests; for assemblies, perform fit and function tests. Record nonconformances as they are discovered rather than masking them.

Step 5 — Compile The FAI Package

An FAI package typically includes measurement reports (CMM printouts or gage logs), material certificates, process records (heat treat sheets, plating reports), setup sheets and machine programs, nonconformance records, and signatures for approval. Label each document clearly and provide an index so reviewers can find data quickly.

Step 6 — Review, Approve, And Archive

Quality, production, and engineering should review the compiled evidence. If the customer requires acceptance, provide the package for customer review and obtain written approval. Archive the FAI package in a controlled system (paper or electronic) linked to the part and lot identifiers; use it as the baseline for future runs and change control.

Common Checklist Items

• Document Control: Latest drawing revision and all governing specifications are present.
• Calibration: All measurement instruments used have current calibration certificates.
• Material Confirmation: Supplier certificates and lot numbers are recorded and traceable.
• Process Records: Setup sheets, machine programs, and heat treat/plating records are included.
• Measurement Data: Complete dimensional reports with actuals, tolerances, and gage method are provided.
• Sign-Offs: Required approvals from production, quality, and engineering are present.

Handling Nonconformances

If the first article fails any criteria, document the deviation immediately and initiate containment. Root cause analysis should follow before modifying tooling or process settings. Depending on contract terms, a reworked part may require a partial or full repeat FAI and updated documentation identifying changes made.

Practical Tips To Reduce Rework

• Pre-build Prototypes: Where feasible, run prototype samples to flush out design or process issues before the formal FAI.
• Cross-Functional Reviews: Hold a kickoff meeting with engineering, manufacturing, and quality to align expectations and highlight CTQs.
• Use Digital Templates: Standardized electronic FAI templates speed compilation and improve consistency between suppliers and locations.
• Train Inspectors: Ensure inspectors understand drawing symbology, GD&T, and functional intent to avoid misinterpretation.

In short, the First Article Inspection is a structured, evidence-based activity that confirms a production process produces parts to specification. Following a clear step-by-step approach—review, prepare, produce, inspect, compile, and approve—keeps production predictable and defensible to customers and regulators.