Entrusting your printed circuit board (PCB) design and bill of materials (BOM) to an Electronic Manufacturing Services (EMS) supplier is a major decision. The right EMS partner influences your product quality, overall manufacturing cost, time-to-market, supply chain stability, and even long-term brand reputation.

Before committing to any EMS provider, in-depth communication and thorough evaluation are crucial. To help you confidently select the right partner, TECOO recommends asking these six essential questions.

1. In which industries or product categories does your EMS company have proven manufacturing experience?

Why this matters

A factory that excels at consumer electronics may not meet the strict performance and reliability standards required for industrial, automotive, or medical PCBA manufacturing. Matching experience helps reduce risks in both prototype and mass production stages.

What a qualified EMS supplier should provide

A professional EMS provider should clearly outline:

• Their core manufacturing sectors
• Typical PCB assembly projects
• Case studies or capability summaries
• Certifications relevant to your industry (e.g., IATF 16949, ISO 13485)

TECOO's perspective

With over 20 years in the global electronics manufacturing industry, TECOO has delivered high-reliability PCB assembly solutions across multiple markets. We understand the unique R&D and manufacturing requirements of each industry segment.

2. What is your end-to-end process from DFM review to final PCB assembly delivery?

Why this matters

EMS projects succeed only when the communication and workflow are transparent. You should know exactly how your project is handled, at which stage, by whom, and how issues are escalated or resolved.

What you should expect

An experienced EMS provider should clearly explain:

• DFM/DFT analysis workflow
• Feedback reporting mechanism
• Material procurement strategy
• PCBA production and testing processes
• Communication frequency and roles (sales vs. project manager)

TECOO's perspective

TECOO follows a standardized, transparent project management system. Each client is assigned a dedicated project manager who provides continuous updates, ensuring you always have visibility and control over your PCB manufacturing progress.

3. How does your supply chain management handle component shortages and market fluctuations?

Why this matters

Supply chain capability significantly impacts your on-time delivery rate. A strong EMS partner must predict shortages early, secure competitive pricing, and offer alternative component options when required.

What you should expect

Look for:

• Long-term partnerships with top distributors and OEMs
• Multi-channel procurement strategies
• Professional material planning and risk assessment teams
• Safety stock or alternative component solutions

TECOO's perspective

TECOO maintains a global, flexible supply chain network powered by market intelligence analysis. We proactively manage risks and secure cost-effective components to ensure your project stays on schedule.

4. How is your quality control system implemented in PCB assembly?

Why this matters

Quality must be measurable. You need more than verbal assurances—you need to understand process-level controls.

What you should expect

A trustworthy EMS company should provide:

• Certifications like ISO 9001 / IATF 16949
• IQC, IPQC, and OQC procedures
• AOI, SPI, X-ray, ICT, and functional test capabilities
• SOPs and statistical process control (SPC)

TECOO's perspective

At TECOO, quality is embedded into each manufacturing stage. With advanced inspection equipment and data-driven process control, we ensure exceptional yield performance and long-term product reliability.

5. What testing services and coverage do you offer after PCB assembly?

Why this matters

Testing is the final quality checkpoint before shipment. Comprehensive testing ensures product stability and minimizes field failures.

What you should expect

EMS testing capabilities may include:

• In-circuit testing (ICT)
• Flying probe testing
• Functional circuit testing (FCT)
• Burn-in and environmental stress screening

TECOO's perspective

TECOO develops customized test fixtures and procedures tailored to your design. Our goal is to maximize test coverage and detect any potential defects before delivery.

6. What value-added services can your EMS supplier provide beyond manufacturing?

Why this matters

A true EMS partner contributes to product success—not only by assembling PCBs but also by optimizing your design, reducing costs, and supporting long-term product lifecycle management.

What you should expect

Look for services such as:

• DFM/DFT engineering
• PCB layout optimization
• Cost-down recommendations
• Supply chain and logistics support
• After-sales service

TECOO's perspective

TECOO positions itself as an extension of your engineering and supply chain teams. From early-stage design improvements to post-mass-production support, we help you build competitive and reliable products.

Conclusion: Your EMS supplier shapes your product’s success

Asking the right questions helps you evaluate whether an EMS manufacturer is professional, transparent, and aligned with your long-term goals.

At TECOO, we welcome every question—because transparency and collaboration are the foundation of successful electronics manufacturing partnerships. Our team is ready to demonstrate, through actions and expertise, why TECOO is the right EMS supplier for your next project.

Start your consultation with TECOO today and discover how a reliable EMS partner can elevate your product development and manufacturing success.