15 things to validate before series production.
A practical reference for engineering, quality, and procurement teams.
This checklist covers the 15 critical validation points that separate a working prototype from a product ready for repeatable series production. For each point, assess your current status and use the right-hand column to identify what to request from your electronics manufacturing partner.
✓ YesThis point is validated and documented for your current project.
~ PartialPartially addressed or not formally documented. Needs attention before series.
✗ NoNot addressed. This is a gap that should be resolved before committing to production.
Design Architecture
01 ·Schematic maturity
Has the electronic schematic been reviewed jointly by your design team and your manufacturing partner — not just validated internally?
Request a joint schematic review session before PCB layout begins. A manufacturing partner should flag testability, thermal, and component-risk issues at this stage.
02 ·DFM integration
Has Design for Manufacturability been applied to the PCB layout — optimizing for automated SMD assembly, not just electrical function?
Ask your supplier to provide a DFM report on the layout before prototype build. Key areas: component placement, pad geometry, panelization, and fiducial marks.
03 ·DFT architecture
Are test points, boundary scan access, and functional test strategy defined as part of the board design — not as an afterthought?
Request the supplier’s proposed test strategy (ICT, functional, end-of-line) and confirm that the PCB layout supports it without rework.
Components & BOM
04 ·BOM lifecycle risk
Has every critical component been assessed for availability, second-source options, and obsolescence risk — not just current stock?
Ask for a BOM risk assessment: lifecycle status (active, NRND, EOL), lead times, and identified second sources for single-source components.
05 ·BOM cost optimization
Is the BOM designed for your application’s actual requirements — or does it carry cost overhead from general-purpose reference designs?
Request a BOM cost review comparing your current design against an application-optimized alternative. Custom designs should cost less, not more.
06 ·Component qualification
Have components been validated against the operating environment (temperature range, humidity, vibration) — not just the datasheet?
Ask whether component selection accounts for your actual installation conditions and duty cycle, not just nominal specifications.
Compliance & Certification
07 ·Target certifications mapped
Are the target market certifications (CE, UL, ErP, RoHS, IEC 61800, etc.) identified and shaping design decisions from day one?
Request a compliance matrix: which standards apply, which design choices are affected, and what pre-compliance testing is planned before lab submission.
08 ·Pre-compliance testing
Has EMC and safety pre-compliance testing been conducted before committing to formal laboratory certification?
Ask your supplier whether they perform in-house pre-compliance EMC and safety screening. Failing formal certification is expensive; catching issues early is not.
09 ·Certification ownership
Is it clear who manages the certification process — documentation, lab coordination, test sample preparation, and ongoing compliance maintenance?
Confirm whether your supplier manages certification end-to-end or whether your team needs to coordinate with external labs independently.
Industrialization & Validation
10 ·Prototype-to-series gap analysis
Has the gap between ‘working prototype’ and ‘production-ready product’ been explicitly mapped — tooling, fixtures, test programs, process documentation?
Ask for an industrialization gap analysis: what needs to change between the prototype and series-zero to ensure repeatable production.
11 ·Control plan defined
Is there a documented control plan specifying inspection points, acceptance criteria, and process controls at each production stage?
Request the proposed control plan before series launch. It should cover incoming inspection, in-process controls, and end-of-line test criteria.
12 ·Series-zero validation
Is a pre-production run (series-zero) planned to validate the manufacturing process under real production conditions before full ramp-up?
Confirm that a series-zero run is part of the standard industrialization process — and that its results require formal sign-off before serial production begins.
Production Readiness & Lifecycle
13 ·Traceability system
Can every production unit be traced back to its component lots, production parameters, test results, firmware version, and shipment data?
Ask for a sample traceability report from a recent production batch. If your supplier can’t produce one in hours, the system isn’t ready.
14 ·Multi-series capability
Can your supplier handle your product portfolio realistically — multiple references, varying batch sizes, and rapid changeovers within the same quality system?
Ask how many different product families they produce on the same floor, what the typical changeover time is, and whether the quality system covers all variants equally.
15 ·Lifecycle continuity plan
Is there a documented process for managing component obsolescence, regulatory changes, firmware updates, and design revisions throughout the product lifecycle?
Request the supplier’s lifecycle management protocol: how they monitor obsolescence, how far in advance they alert you, and how they handle last-time-buy decisions.
The same manufacturing readiness checklist, in three common scenarios
The 15 points above apply to any electronics industrialization. What changes between projects is where the gaps usually appear. These are the three scenarios where teams most often run this checklist.
New product industrialization
A working prototype exists and series production is the next step. The most common gaps are in Phase 1 and Phase 4: the design was validated electrically but never reviewed for manufacturability, and the prototype-to-series gap (point 10) was never mapped. Run the full checklist before committing to tooling.
Manufacturing expansion
Volumes are growing, or a product built in one place needs a second line or a new facility. This is where a manufacturing expansion checklist matters most in Phase 4 and Phase 5: control plan (11), series-zero validation on the new line (12), and multi-series capability (14). A process that works at low volume does not automatically scale.
Supplier change or decoupling
Moving production away from a current supplier — for cost, risk, or geographic reasons. A decoupling readiness assessment leans on Phase 2 and Phase 5: BOM lifecycle risk (04), traceability (13), and the lifecycle continuity plan (15). The critical question is whether the documentation that leaves the old supplier is complete enough for the new one to build without reverse-engineering.
Your summary & score
| Phase | Yes | Partial | No |
|---|---|---|---|
| 1. Design Architecture | – | – | – |
| 2. Components & BOM | – | – | – |
| 3. Compliance & Certification | – | – | – |
| 4. Industrialization & Validation | – | – | – |
| 5. Production Readiness & Lifecycle | – | – | – |
| TOTALS (out of 15) | 0 | 0 | 0 |
Your answers stay on this page only — nothing is stored or sent. For a version you can save and share internally, download the PDF above.
How to read your results
12–15 Yes
Your project is well-positioned for series production. Validate the remaining points and proceed with confidence.
8–11 Yes
Foundations are in place, but gaps remain. Address the “No” and “Partial” items before committing to production tooling and series launch.
Under 8 Yes
Significant gaps exist. Industrializing now carries high risk of ECOs, delays, and quality issues. Prioritize the open items and consider engaging your manufacturing partner earlier in the design process.
Ready to close the gaps before they reach the production floor?
Most of these 15 points are easier to address when your electronics partner is involved from the design stage. DFM, DFT, BOM optimization, compliance planning, and traceability architecture are capabilities a co-engineering partner brings before the first prototype is built.
KELD combines co-design, DFM, flexible multi-series production, and full traceability under one roof, in Zaragoza, Spain, since 1972. A 45-minute Technical Discovery Call can help you review your project’s industrialization readiness with an engineering team that manufactures what it designs.
