Vietnam Supplier Qualification:
How We Audit Every Factory
Not every Vietnam factory is ready for export-quality production. Here's exactly how Dewin's on-ground team discovers, qualifies, and monitors the 178+ suppliers in our audited network — so you don't have to.
Why Most Vietnam Factory Searches Fail
Alibaba / directory listings are unverified
Anyone can list on Alibaba. No on-site audit, no equipment verification. You're trusting a profile photo.
Trade fairs give you brochures, not audits
Meeting a supplier at a trade show tells you about their marketing department — not their production floor.
Virtual audits miss critical factory realities
A factory looks very different on a video call vs. a walk of the actual production floor, toolroom, and QC bench.
Language barriers cause spec errors
Without a bilingual technical team on the ground, drawing interpretation errors are common and expensive.
✓ The Dewin Difference
Physical on-site audit before any factory enters our network
50-point scored inspection across 5 pillars: facility, equipment, QC, workforce, compliance
1,700+ real photos from audit visits — machines, production lines, QC benches, packaging
Bilingual technical team reviews every drawing before sending to factory
Pre-shipment inspection on every production order
Ongoing periodic re-audits to maintain quality standards
Our 6-Step Supplier Qualification Process
Every factory in our network went through every step of this process before being approved. No shortcuts.
Factory Discovery
Our on-ground team in Ho Chi Minh City, Binh Duong, Dong Nai, and Hai Phong actively identifies candidate factories through local industrial networks, zone development authorities, and referrals from existing verified suppliers.
Document & Registration Verification
Before setting foot on the factory floor, we verify key documents to screen out shell companies and recently-formed fronts.
On-Site Dolphin Audit (50 Points)
Our trained auditors conduct a full physical inspection using the Dolphin scoring framework. Factories must score 70/100 or above to join our network.
Pillar 1: Facility & Safety
10 pts- • Building condition and fire safety systems
- • Electrical installation compliance
- • Worker safety equipment and signage
- • Storage and material handling layout
- • Environmental waste handling
Pillar 2: Equipment & Capacity
10 pts- • Machine age, brand, and condition
- • Production capacity vs. stated capacity
- • Toolroom and fixture capability
- • Equipment maintenance records
- • Bottleneck identification
Pillar 3: Quality Systems
10 pts- • Incoming material inspection process
- • In-process quality check stations
- • Final inspection equipment (CMM, gauges)
- • Non-conformance tracking and rework
- • Customer complaint history
Pillar 4: Workforce & Management
10 pts- • Workforce size and skill level
- • Management stability and experience
- • Technical team English communication
- • Production scheduling system
- • Turnover rate and worker retention
Pillar 5: Export & Compliance Readiness
10 ptsPhoto & Video Documentation
Every audit visit includes a full photo and video walkthrough. This is why our factory database is unlike anything else in the industry — every factory profile shows real machines, real workers, real conditions.
Sample & First Article Approval
For every new project, the factory produces sample parts before production commit. Our technical team inspects dimensions, surface finish, and functionality against your engineering drawings.
Ongoing Monitoring & Re-Audit
Qualification isn't a one-time event. Our team monitors performance across every order and re-audits factories periodically to maintain quality standards.
Per-Order Monitoring
- ✓ Production progress photos during run
- ✓ Pre-shipment inspection (100% or AQL)
- ✓ Packing and labeling check before container load
- ✓ C/O and customs documentation review
Periodic Re-Audit
- ✓ Dolphin score re-evaluated annually
- ✓ Equipment and capacity updates logged
- ✓ Certification renewal tracking
- ✓ Management change alerts
178+ Audited Factories Across 50+ Processes
Our qualified supplier network covers the full range of Vietnam manufacturing capabilities.
CNC Machining
Precision turning & milling. Tolerances to ±0.005 mm. 3-, 4-, and 5-axis capability.
Die Casting
Aluminum & zinc HPDC. Tolerances to ±0.05 mm. Ra 0.8–3.2 μm surface finish.
Sheet Metal & Welding
Laser cutting, punching, bending, MIG/TIG/robotic welding, powder coating.
Injection Molding
Single & multi-cavity tooling. PP, PE, ABS, PA6, PC. Mold life 300K–1M shots.
Stamping & Forming
Progressive die, transfer die, deep draw. Tolerances to ±0.1 mm. High-volume capability.
Assembly
Sub-assembly and full assembly. Hardware insertion, functional testing, kitting, BOM sourcing.
How Dewin Factory Qualification Compares
Most platforms show you an anonymous supplier. We show you the factory floor.
| Qualification Criteria | Dewin | Alibaba | Trade Fairs | Instant-Quote Platforms |
|---|---|---|---|---|
| On-site physical audit | ✅ Every factory | ❌ | ❌ | Varies |
| Scored audit framework | ✅ 50-point Dolphin | ❌ | ❌ | Unknown |
| Real factory photos | ✅ 1,700+ photos | Self-uploaded | Booth photos | ❌ Anonymous |
| Named factory profiles | ✅ Full profiles | Partial | Business cards | ❌ Anonymous |
| Equipment list per factory | ✅ | ❌ | ❌ | ❌ |
| Pre-shipment inspection | ✅ Every order | ❌ | ❌ | Optional |
| Bilingual QC team in Vietnam | ✅ Full-time team | ❌ | ❌ | ❌ Platform only |
Frequently Asked Questions
Access Our Audited Factory Network
Send us your RFQ and we'll match you with the right pre-qualified Vietnam factory for your process, volume, and quality requirements — usually within 24 hours.