The Complete
Vietnam Sourcing
Guide
Everything manufacturing buyers need to know about sourcing from Vietnam — tariff advantages, factory selection, quality assurance, logistics, and real cost benchmarks. Written by a team with boots on the ground.
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Why Vietnam? The Strategic Case
Vietnam has emerged as the world's fastest-growing alternative to China for manufacturing sourcing. With a young, skilled workforce of 55+ million, competitive labor costs, and aggressive government investment in industrial infrastructure, Vietnam offers a compelling combination of capability and cost advantage.
The "China+1" Strategy
Smart procurement teams aren't abandoning China entirely — they're diversifying. The "China+1" strategy means maintaining existing Chinese suppliers while qualifying alternative sources in Vietnam. This reduces single-country risk, creates competitive pricing leverage, and insulates your supply chain from geopolitical disruption.
Vietnam's Manufacturing Sweet Spots
- CNC Machining — Vietnam's CNC sector has matured rapidly with Japanese and European machines. Tolerances of ±0.01mm are routine.
- Sheet Metal & Welding — Laser cutting, press braking, TIG/MIG welding with certified welders.
- Die Casting — Aluminum and zinc high-pressure die casting with in-house tooling. 500T–2,500T machines common.
- Injection Molding — Engineering plastics and silicone. Many factories serve Japanese automotive OEMs.
- Assembly & Integration — Sub-assembly, wiring harnesses, and full product assembly.
Tariff Landscape & Cost Advantage
Section 301 tariffs add 25–100% to the landed cost of Chinese-made parts. Vietnam is not subject to Section 301 tariffs, creating an immediate and substantial cost advantage.
Landed Cost Comparison: China vs. Vietnam
For a typical CNC machined aluminum part ($10,000 order)
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Manufacturing Capabilities in Vietnam
Driven by Japanese, Korean, and European FDI, Vietnamese factories now operate world-class equipment and quality systems. Here's what you can reliably source:
CNC Machining
Milling (3/4/5-axis), turning, EDM, grinding. Tolerances to ±0.005mm.
Learn more →Sheet Metal
Laser cutting, punching, bending, welding, powder coating, anodizing.
Learn more →Die Casting
High-pressure aluminum & zinc. 200T–2,500T machines. In-house tooling.
Learn more →Injection Molding
Engineering plastics. 50T–1,600T machines. Rapid tooling in 2–3 weeks.
Learn more →Powder Metallurgy
Complex metal parts via sintering. High-volume with tight repeatability.
Learn more →Assembly
Mechanical assembly, testing, packaging. Turnkey parts-to-product solutions.
Learn more →How to Vet & Select Factories
Selecting the wrong factory wastes months and thousands in tooling costs. Here's our 50-point framework — the same one we use to vet all 179+ factories in our network.
Equipment & Capability (12 pts)
Machine inventory, age, maintenance records, calibration certs.
Quality System (10 pts)
ISO certifications, inspection equipment, control plans, PPAP readiness.
Workforce & Management (8 pts)
Operator skill levels, training, English capability, turnover rates.
Capacity & Scalability (6 pts)
Utilization rate, expansion plans, shift structure.
Financial Stability (6 pts)
Years in business, major customers, facility ownership.
Environmental & Compliance (4 pts)
Waste handling, worker safety, environmental permits.
Communication (4 pts)
Response time, drawing review quality, engineering change management.
Why DEWIN Is Different
We've personally visited and audited every factory — with 9,000+ photos and 650+ videos as proof. Explore our network →
Quality Assurance & Certifications
ISO 9001:2015
Baseline quality management. Every serious factory should have this.
IATF 16949
Automotive quality. If a factory has this, they can make anything.
ISO 13485
Medical devices. Signals top-tier quality systems.
AS9100D
Aerospace. Exceptional traceability and documentation.
Quality Control Playbook
- 1First Article Inspection (FAI) — Complete CMM reports before production begins.
- 2In-Process Inspection — Checkpoints at raw material receipt, mid-production, and pre-shipment.
- 3Pre-Shipment Inspection — AQL sampling (Level II, AQL 1.0 critical / 2.5 major).
- 4Photo Documentation — Timestamped photos at every production stage.
Logistics, Shipping & Lead Times
Typical Project Timeline
Quotation & Factory Matching
Tooling (if needed)
Sample Production & Approval
Full Production Run
Pre-Shipment Inspection
Shipping & Delivery
Total lead time: 8–12 weeks (new projects). Repeat orders: 3–5 weeks. CNC-only: 4–6 weeks door-to-door.
IP Protection & Contracts
IP protection is a legitimate concern when sourcing overseas. Practical measures can effectively protect your designs.
- NDA — Sign before sharing drawings. Include penalties and arbitration clause (Singapore or Hong Kong).
- Tooling Ownership Agreement — All molds, jigs, fixtures are your property with right to retrieve.
- Manufacturing Agreement — Quality, delivery, warranty, Incoterms (FOB or CIF recommended).
- Non-Compete Clause — Prevent the factory from selling your parts to competitors.
Pro tip: Split production across multiple factories so no single supplier has your complete product. Use DEWIN as an intermediary for added IP protection.
Getting Started: Your First Order
- 1
Start With a Low-Risk Part
A bracket, housing, or cover plate — validate quality without risking a line shutdown.
- 2
Prepare Clear Documentation
2D drawings with GD&T, material specs, finish requirements, and quantity.
- 3
Get Multiple Quotes
Compare at least 3 factories — or let DEWIN match from our pre-vetted network.
- 4
Order Samples First
Always. Order 5–10 samples, measure every dimension, test functionality.
- 5
Scale Gradually
Start with 50–100 units. Validate end-to-end before committing to volume.
Ready to Source from Vietnam?
Skip the learning curve. DEWIN has 179+ pre-audited factories, on-the-ground engineers, and a proven process that's saved clients millions.