Our 6-Step Quality Control Process
Drawing and Specification Review
Technical requirements and critical dimensions are reviewed to establish precise control points before manufacturing.
Focus areas: Material specs, tolerances, hole locations, bend angles, machined features, surface treatments, and assembly interfaces.
Material Verification
Raw materials are verified against project specifications prior to production.
Material certificates (Mill Test Reports) are recorded for full lot traceability.
First Article Inspection (FAI)
The first completed component is inspected against approved drawings before mass production begins.
Purpose: Verifies critical dimensions, hole locations, and mounting interfaces to prevent large-scale errors.
In-Process Inspection
Continuous dimensional and feature checks are performed during production runs to catch deviations early.
Focus areas: Cut dimensions, bend accuracy, thread pitch, surface profiles, and weld integrity.
Final Inspection
Completed components undergo thorough end-to-end verification before shipment.
Focus areas: Overall dimensions, tight tolerances, surface condition, packaging integrity, and order quantity.
Quality Documentation and Traceability
Industry-standard inspection records and certificates are compiled to support your incoming inspection and supplier audit requirements.
Process-Specific Quality Control Specifications
|
Manufacturing Process |
Critical Inspection Points |
Primary Verification Focus |
|
Sheet Metal Fabrication |
Cut dimensions, hole location accuracy, bend angles, formed features, weld quality |
Assembly fit, structural integrity, surface finish condition |
|
CNC Machining |
Tight tolerances, hole diameters, threads, geometric profiles, surface roughness |
Precision fit, critical mounting dimensions, functional alignment |
|
Metal Stamping |
Formed geometry, hole positions, material hardness, wall thickness |
High-volume dimensional consistency, structural stability |
|
Custom Molding |
Wall thickness uniformity, cosmetic appearance, material properties |
Visual quality, parting line accuracy, mating part alignment |
Available Quality Documentation
|
Document Type |
Purpose and Content |
Application Scenario |
|
First Article Inspection Report (FAIR) |
Documents dimensional and functional checks of the first production part |
New product launches, revised drawings, critical assemblies |
|
Dimensional Inspection Report |
Records measured results for all specified drawing dimensions |
Standard production quality records, sample approval |
|
CMM Inspection Report |
Provides coordinate-based measurement data for complex profiles and geometries |
Precision CNC parts, tight-tolerance aerospace/automotive components |
|
Material Certificate |
Verifies chemical composition and mechanical properties of the raw material |
OEM supply chain compliance, material lot traceability |
|
Certificate of Compliance (CoC) |
Formal certification confirming parts comply with order requirements |
Regulatory compliance, client quality audit records |
Custom Quality Requirements and RFQ Checklist
We accommodate custom inspection plans, special tolerances, and client-specific quality forms. To ensure an efficient technical review, please provide the following details with your Request for Quotation (RFQ):
2D Engineering Drawings (PDF format with tolerances specified)
3D CAD Files (STEP, IGES, or X_T format)
Material and Surface Finish Specifications
Critical Dimensions / Key Characteristics (KCs)
Order Quantity (Prototype or full production run)
Required Quality Documents (FAI, CMM, Material Certs, CoC, etc.)