Precision Quality Control & On-Site Inspection in China
Protect your supply chain before cargo leaves the factory. Tommysourcing deploys experienced engineering inspectors across China to perform rigorous AQL-standard audits, functional tests, and defect verification.
Detailed Report Delivery
Sampling Standards
Audited Facilities
Pre-Shipment Inspection (PSI)
Industrial Hardware & Mechanical Assemblies
Eliminate Supply Chain Surprises Before Export
Overseas buyers face high costs when defective products ship overseas. Our on-the-ground engineering team prevents substandard materials, inaccurate packaging, and production delays.
Avoid Costly Return Logistics
Returning non-compliant inventory back across international borders is virtually impossible. Catching defects before final balance payment and shipment protects your capital.
Enforce Specification Accuracy
Suppliers sometimes substitute raw materials or adjust tolerances without notice. We cross-examine BOMs, technical drawings, raw material certificates, and finish treatments.
Ensure E-Commerce & Retail Compliance
Ensure Amazon FBA, retail chain, and regional regulatory compliance—including carton barcodes, labeling, user manuals, drop testing, and carton crush ratings.
Core Quality Control & Inspection Services
Choose standalone inspections for individual purchase orders or integrate full-cycle monitoring throughout production.
Initial Production Check (IPC)
Conducted right as raw materials and primary components arrive at the factory before full-scale assembly begins. We confirm material grade, tooling calibration, and setup standards.
- Raw material & component verification against approved samples
- First-article measurement & mold / tooling verification
- Early correction of manufacturing misunderstandings
During Production Inspection (DUPRO)
Evaluates line production in real-time. We check work in progress, verify batch consistency, calculate actual manufacturing throughput, and ensure the target shipping schedule is on track.
- Identification of systemic defects across live assembly lines
- Realistic lead-time evaluation and bottleneck discovery
- Immediate on-site containment and corrective action plans
Pre-Shipment Inspection (PSI / FRI)
The definitive gatekeeper before authorizing final wire transfer. Using internationally recognized ISO 2859-1 (AQL) standards, we perform comprehensive visual, dimensional, and functional audits.
- AQL sampling for critical, major, and minor defect classifications
- Complete packaging, carton barcodes, master markings, and palletization
- Definitive Pass / Fail / Pending judgment with HD photographic proof
Container Loading Supervision (CLS)
Ensure the right goods are loaded into clean, weatherproof containers under safe handling practices. We prevent damaged cartons, improper stacking, and container seal tampering.
- Container structural integrity, dryness, odor & rust check
- Carton quantity verification and secure weight distribution
- Customs seal recording and full container lock photography
Standard 7-Point Inspection Protocol
Every Tommysourcing inspection follows custom inspection checklists built around your product requirements, CAD files, and international trade benchmarks.
1. Dimensions & Tolerances
Vernier calipers, micrometers, and precision gauges verify length, wall thickness, hole diameter, angle pitch, and structural profile specs.
2. Functional & Safety Tests
Power on/off cycles, mechanical tension tests, fitment assembly checks, torque testing, hi-pot electrical safety, and load-bearing stress tests.
3. Visual & Cosmetic Check
Scratch, burr, weld splatter, color variance (Pantone matching), coating blemishes, logo alignment, and surface smoothness audits.
4. Packaging & Carton Drop Test
ISTA 1A/2A drop tests, gross/net weight verification, carton burst strength check, inner polybag thickness, and moisture silica gel verification.
5. Barcode & Label Legibility
1D/2D barcode scan verification, UPC/EAN check, Amazon FNSKU validation, shipping mark positioning, Country of Origin (COO), and CE/FCC marks.
6. Quantity & Order Completeness
Physical piece-by-piece tally of finished vs. unfinished units, spare parts, accessory sets, hardware packs, and user instruction manuals.
Transparent AQL Sampling & Same-Day Inspection Reports
We follow the ISO 2859-1 (ANSI/ASQ Z1.4) standard for statistical sampling. You receive a comprehensive inspection dossier with high-resolution photographic evidence within 24 hours of factory departure.
0% Tolerance for Safety & Legal Hazards
Zero tolerance for dangerous sharp edges, electrical shorts, or severe non-compliance.
Functional & Commercial Defects
Defects that would likely result in consumer return or structural impairment.
Minor Cosmetic Variations
Small visual imperfections that do not diminish product usability.
Official QC Inspection Report
Product Categories We Inspect Across China
Headquartered in Suzhou with extensive coverage across Jiangsu, Zhejiang, Guangdong, Shandong, and nationwide industrial manufacturing hubs.
Hardware & Fasteners
Strut channels, fittings, nuts, bolts, clamps & stamping parts
Building Materials
Pipes, valves, aluminum extrusions, ceramics & glass fittings
Machinery & Components
CNC machining, motor housings, sheet metal & OEM assemblies
Consumer & Home Goods
Kitchenware, pet products, electrical appliances & e-commerce goods
How to Book an Inspection with Tommysourcing
Our streamlined 4-step workflow ensures your factory is audited rapidly without administrative delays.
Send Order Specs
Provide purchase order details, factory contact, CAD files, golden sample specs, and preferred inspection dates.
Checklist Creation
Our engineers build a tailor-made inspection checklist, determine the AQL sampling plan, and confirm the visit with the factory.
On-Site Execution
Our certified inspectors travel to the supplier factory, perform physical sampling, conduct functional testing, and document defects.
24h Comprehensive Report
Receive the official pass/fail report with rich photo/video proof, giving you full leverage to approve shipment or demand rework.