What NPI covers
NPI begins once a design is concrete enough for a factory to review and build, and ends when production is stable enough to hand to the normal manufacturing organization. It usually runs through a series of builds, commonly EVT, DVT and PVT, each with its own purpose and exit criteria. Around those builds sits the less visible work: DFM reviews, tooling and mold trials, test development, qualification of component suppliers, work instructions and quality plans.
The builds themselves are explained in the EVT, DVT and PVT guide. This entry is about NPI as a process: who owns it and what it must produce.
NPI, NPD and mass production
| Term | Main question | Typical owner |
|---|---|---|
| NPD (new product development) | What should we build, and does the design work? | The brand’s product and engineering team |
| NPI (new product introduction) | Can the design be built repeatably at target cost and quality? | Shared between brand and factory NPI teams |
| Mass production | Are we building it consistently, on time and at cost? | The factory’s production team, with brand oversight |
NPD and NPI overlap. Feedback during NPI can still change the design, which is why NPI should start well before the design is declared finished.
Two NPI teams, one product
Most established OEM/ODM partners and EMS providers in Asia have a dedicated NPI team: program managers, manufacturing engineers, test engineers and quality engineers who take a product from first build to production handover. The brand needs a counterpart who owns the requirements, approves changes and signs off each gate. When nobody on the brand side holds that role, the factory makes the decisions by default, usually in favor of whatever is easiest to build.
NPI deliverables to track
By the end of NPI, each of these should exist, be reviewed and be under change control:
- A released BOM with approved sources for every part, and second sources where practical
- Production tooling accepted after trials, with ownership documented
- Production test stations and fixtures, with agreed limits and results logged against serial numbers
- Work instructions and a process flow for every station
- A control plan and process FMEA covering the critical characteristics
- Inspection criteria for incoming, in-process and outgoing quality (IQC, IPQC and OQC), including cosmetic standards
- An approved golden sample for reference
- Certification reports for each target market
- Packaging and transit test results, labels and shipping documents
- Yield and defect data from the final pre-production build
Running NPI with a factory in another time zone
- Hold formal gate reviews. At each build, record what passed, what failed and what must be fixed before the next build.
- Keep one issue list. A shared tracker with an owner and due date for every item, reviewed weekly, stops problems from disappearing between email threads and chat apps.
- Be on site for key builds. A day on the line at the first build of each stage shows more than a week of photos.
- Control changes from the first build. Route every change through an ECN/ECO, even early, so that the build history stays traceable.
Common mistakes
- Treating NPI as the factory’s job. The factory runs the line, but the brand owns the requirements and the acceptance decisions.
- Starting tooling before DFM comments are closed, then paying for tool modifications.
- Shortening the schedule by skipping a build instead of reducing scope or adding resources.
- Writing test specifications late, so that test development holds up PVT.
Where Zefinity helps
NPI and technical project management are at the center of Zefinity’s Launch service, together with supplier coordination, issue resolution, manufacturing engineering support and production readiness with your OEM/ODM partner in Asia. See Launch: navigate NPI and scale production and the NPI readiness checklist.
Frequently asked questions
How long does NPI take?
It depends on product complexity, how mature the design is at the start, tooling lead times and certification. A product that reuses proven designs can move through quickly, while a new connected device with custom enclosures and radio certification often takes many months. Build the plan from tooling lead times and the number of builds you need, not from a generic figure.
What does an NPI engineer do?
On the factory side, an NPI engineer takes a new product through its builds into production: preparing each build, setting up stations, resolving process and fixture problems and handing the product over to the production team. On the brand side the counterpart is often called an NPI or manufacturing program manager.
When should NPI start?
Earlier than most teams expect: once the architecture and main components are chosen, usually before EVT. Involving the factory's manufacturing, test and quality engineers at that point lets them review the design while changes are still cheap, and gives long-lead parts, tooling and test development time to start. A pilot run is one event late in NPI, not its beginning.