Hardware launch guide
Hardware launch guide: from prototype to mass production
Getting a hardware product into production is a sequence of builds and decisions, each with a gate. This guide maps the seven stages from concept to ongoing supply, what has to be true before you move on, and where teams working with OEM/ODM partners in Asia most often lose time.
Overview
What a hardware launch involves
A hardware launch takes a product from a working prototype to units coming off a production line at the planned rate, cost and quality. Most programs run through seven stages: concept and product requirements, design and DFM, three validation builds (EVT, DVT and PVT), mass production and ramp-up, and ongoing supply. Each stage ends at a gate: a decision, made on evidence, about whether the product and the process are ready for the next commitment.
The gates exist because the cost of a change rises at every step. A change on paper costs engineering time. The same change after production tooling is cut means a tool modification and lost weeks; after certification it can mean retesting; after shipment, a field fix. Passing each gate on evidence rather than on a date is what keeps a launch on schedule.
The stage names below are the ones most electronics and connected-device companies use. Factories label builds in their own ways, so the labels matter less than the conditions written into each build plan.
The stages
Seven stages, seven gates
Each stage lists what happens and the gate to pass before the next commitment.
Concept & PRD
Define who the product is for, what it must do, the markets it will be sold in, the target cost and the volumes you expect. Works-like and looks-like prototypes test feasibility and the user experience. The output is a product requirements document (PRD) that engineers and suppliers can work from.
Gate to pass. Requirements clear enough to design and quote against: functions with measurable targets, target markets and the certifications they imply, a target landed cost and volume range, and a list of open questions with owners.
PRDPreparing a supplier briefOEM/ODM readiness reviewCertification planning
Design & DFM
Industrial, mechanical and electrical design, firmware architecture and, usually in parallel, the choice of manufacturing partner through an RFQ, quotation analysis and supplier qualification. Manufacturing engineers review the design for molding, PCB assembly, final assembly and test before anything is committed.
Gate to pass. Design released for EVT: schematics and layout reviewed, a BOM with sourced parts and long-lead items ordered, DFM findings logged with decisions, a partner selected on evidence, and an EVT test plan with pass criteria.
EVT: engineering validation
The first build of the integrated product, with production-intent electronics in enclosures that are usually 3D printed, machined or from early tools. It proves the design works: functions, power, radio performance, thermal behavior and pre-compliance scans.
Gate to pass. Every functional requirement met, or each failure explained with an agreed fix, and the mechanical design settled enough to order production tools.
DVT: design validation
Units with parts from production tools, in final materials and finishes, run the full verification plan: reliability, ingress protection where claimed, cosmetics, transit tests, user trials and formal certification testing.
Gate to pass. Test reports passed, design and cosmetics frozen, certification submitted or complete, and a golden sample signed. From here on, changes go through formal change control.
PVT: production validation
The first run on the mass-production line: production operators following released work instructions, with the line’s own fixtures and test stations, and material bought through the production supply chain. It validates the process, not the design.
Gate to pass. Yield and cycle time at target or with an agreed recovery plan, test coverage confirmed, first article approved, the inspection plan in place, and a formal release to production.
Pilot production runPVTFirst article inspectionFirst-pass yield
Mass production & ramp-up
Volume builds start below the planned rate and step up as yield, cycle time and material supply prove stable. Incoming, in-process and outgoing inspection run against the quality plan, and defects go through corrective action.
Gate to pass. Planned output and yield held over consecutive builds, with material supply covering the forecast and no open corrective actions that affect the customer.
Ongoing supply
Supplier performance reviews, engineering changes, component obsolescence and second sources, cost reductions and the next product revision. Every change to parts, processes or suppliers is approved before it reaches the line.
Gate to pass. No single gate. The relationship is kept on current evidence: quality data, delivery performance and changes that were approved before they happened.
At a glance
What each gate protects you from
| Stage | The question it answers | What goes wrong if it is rushed |
|---|---|---|
| Concept & PRD | What exactly are we building, for whom, at what cost? | Suppliers quote different products, so the quotes cannot be compared |
| Design & DFM | Can it be made, and who should make it? | Features that need costly tool changes or cause scrap |
| EVT | Does the design work? | Production tooling ordered for a design that still has to change |
| DVT | Does the final design meet every requirement? | Reliability and cosmetic problems found by customers instead of the lab |
| PVT | Can the factory build it repeatably at rate? | Low yield and defective units in the first shipments |
| Ramp-up | Can rate, cost and quality hold as volume grows? | Material shortages and quality drift |
| Ongoing supply | Is it still the product we approved? | Uncontrolled part substitutions and process changes |
The three validation builds are compared in detail, with quantities, tests, entry and exit criteria, in EVT vs DVT vs PVT.
Alongside the stages
Tracks that run in parallel
These do not have stages of their own, but each one can hold a gate if it falls behind.
- Tooling. Released part by part once EVT has proven the design, trialed and corrected (T1, T2 and later) for DVT, and approved with final texture before PVT. Tooling guide
- Certification. Target markets set the requirements at concept; pre-compliance scans run in EVT; formal testing uses frozen DVT units. Certification planning
- Supply chain. Long-lead components and approved alternates are secured from design onward, and production quantities before PVT. BOM
- Production test. Each build has a test plan; the production test stations that check every unit must be proven before PVT, not during it. ICT and FCT
- Firmware. Bring-up for EVT, feature-complete for DVT, a production build with factory programming and test modes for PVT.
- Packaging. Designed alongside the product and transit-tested with DVT units, so packing is ready for the PVT line.
In depth
Stage guides
- EVT vs DVT vs PVT: what each build proves and how to pass each gateEVT, DVT and PVT are the validation builds between prototype and mass production. What each proves, typical quantities, tests, exit criteria and owners.
- Design for manufacturing (DFM) review: what it covers and how to run oneA DFM review checks a design against how it will be molded, assembled and tested before tooling is cut: what it covers, when to run it, how to act on findings.
- Tooling and injection molding: how to plan, pay for and approve production toolsHow injection mold tooling works in a hardware launch: tool types and mold classes, cost drivers, lead times, T0/T1/T2 trials, approval and tool ownership.
- Pilot production runs: how to plan the build that proves your lineHow to plan a pilot production run: choosing the build size, preparing the line, tracking yield and defects, signing golden samples and setting exit criteria.
- Mass production ramp-up: capacity, yield and change controlHow to ramp from pilot to full-rate production: the ramp curve, capacity and materials, yield learning, quality gates, ECN control and supplier scorecards.
- Product certification planning: what to test, when, and who owns itPlan electronics certification early: FCC, CE (RED, EMC, LVD), UKCA, safety and battery testing, lab selection, pre-scans, EVT/DVT/PVT timing and ownership.
Where we fit
We’re not a sourcing agent. We’re your Asia hardware launch partner.
Finding a factory is easy. Finding the right manufacturing partner and successfully getting your product into production is much harder. Zefinity works across the stages from Hong Kong, with OEM/ODM partners in China and Southeast Asia, through three services:
- Develop Concept & PRD, Design & DFM
PRD review, product definition and supply chain strategy, technical advisory, engineering resource access and manufacturing readiness assessments, before you engage a manufacturing partner. - Connect Design & DFM, prototype and pilot builds
OEM/ODM identification and technical supplier matching, RFQ management and quotation analysis, factory audits and supplier qualification, and coordination of prototype and pilot builds. - Launch EVT through ongoing supply
NPI and technical project management, supplier coordination and issue resolution, manufacturing engineering support, QA and corrective action follow-up, production readiness and ramp-up, and ongoing supplier performance management.
You can start at any stage: Develop while requirements are still forming, Connect when the design is ready to quote, Launch when you already work with a supplier and need the builds and the ramp under control.
- Supplier quote comparison calculatorCompare supplier quotes on total cost at your volumes, with NRE, tooling and freight included.
- Electronics factory audit checklistWhat to check when auditing an electronics or NPI factory before you commit a build.
- OEM/ODM RFQ template (Excel and Markdown)One request package, so every supplier quotes the same product.
- From prototype to production: an NPI readiness checklist for EVT, DVT and PVTWhat should be in place before a design moves into production builds.
- How to choose an OEM/ODM partner in Asia: five steps and a scorecardHow to compare and select an OEM/ODM partner.
- What to include in an OEM/ODM RFQ: a checklist for quotes you can compareThe information suppliers need to quote accurately.
- A practical hardware quality plan, from requirements to corrective actionInspection, testing and corrective action in practice.
FAQ
Questions about hardware launches
How long does it take to go from prototype to mass production?
It depends mostly on how much of the design is new. A product adapted from an existing ODM platform with modest changes can move faster than one with custom electronics and enclosures. For new designs, each validation build is a cycle of parts, build, test and fixes that takes weeks, and tooling, certification, long-lead parts and repeat builds add to it. Plan from your own gates and lead times, not a generic timeline.
What is the difference between EVT, DVT and PVT?
EVT (engineering validation test) proves the design works. DVT (design validation test) proves that the final design, made with production tools and materials, meets every requirement, including reliability and certification. PVT (production validation test) proves the factory can build it repeatably on the production line at rate. Each build needs its own exit criteria, written before it starts.
When should we involve a manufacturing partner?
Before the design is frozen. Manufacturing engineers should review the design for molding, PCB assembly, final assembly and test while changes are still cheap, which usually means during detailed design and before production tooling is ordered. Engaging earlier also lets a partner’s capabilities and existing platforms shape the design, which matters most when working with an ODM.
If an ODM runs the builds, who decides when a gate is passed?
You should. An ODM may run the builds, the tests and even certification, but the brand carries the warranty and usually the regulatory responsibility, so the brand approves the test plan, reviews the reports, signs the golden sample and releases the product to production. Write the exit criteria into the development agreement so each build ends with evidence, not just a box of samples.
Send a short brief, or email Kevin
A few sentences on the product, its stage and where you need help. No confidential CAD or BOM needed.