POC, prototype and pre-series: what is the difference for your product project?
POC, functional prototype, representative prototype, pre-series: clarify each stage before industrializing your product and avoid costly confusion.
In project meetings, POC, prototype and pre-series are often used interchangeably. Yet each maps to a different objective, maturity level and budget. Confusing them means launching pre-series too early — or staying stuck in POC while the market expects a testable product.
This guide clarifies definitions, expected deliverables and criteria for moving from one stage to the next. It targets SMEs, hardware startups and R&D teams preparing a product launch with a digital manufacturing partner such as NC Factory.
POC (Proof of Concept)
A POC answers one question: "Does the principle work?" It can be rough, partially dimensioned, built with substitute materials. The goal is to validate a technical or ergonomic hypothesis — not to impress an end customer.
- Goal: reduce technical risk
- Quantity: 1–3 units often enough
- Materials: whatever is available quickly (PLA, MDF, raw aluminum…)
- Documentation: internal notes, photos, test report
- Example: a latch mechanism tested in 3D print before designing the final enclosure
A successful POC does not mean you are ready to sell. It is a green light to invest in a more complete prototype.
Prototype: several maturity levels
Prototype is broader than POC. We usually distinguish the functional prototype (proves the product performs its job) from the representative prototype (close to final materials, finish and dimensions).
Functional prototype (alpha)
It integrates key functions: mechanics, electronics, interface. Tolerances may be loose, aesthetics secondary. Used for lab or simulated testing. Typical build: technical 3D printing, CNC for critical parts, manual assembly.
Representative prototype (beta)
It approaches what you will show pilot customers or investors. Target materials, visible finishes, validated ergonomics. Often used for pre-orders or sales demos. User feedback at this stage feeds directly into DFM before pre-series.
Pre-series: validate the process, not just the product
Pre-series produces a small lot of units nearly identical to the production version, using the chosen manufacturing process. The question is no longer only "does it work?" but "can we make N units with the same quality and cost?"
- Typical quantity: 5–100 units by sector
- Process: intended series process (CNC, production 3D printing, injection if mold exists…)
- Controls: inspection sheets, measured tolerances, scrap rate tracked
- Logistics: packaging, manual, labeling tested
- Decision: go / no-go for commercial launch or tooling order
When to move to the next stage
POC → prototype: when the principle is validated and subsystems to integrate are identified. Prototype → pre-series: when design is frozen (or nearly), materials chosen and user tests no longer challenge product architecture. Pre-series → series: when conformity rate, unit cost and lead times are stable across several batches.
Need help structuring these stages? See our B2B offer or request a POC / prototype / pre-series quote.
FAQ
Yes, if the principle is already proven (standard component, known mechanism). For mechanical innovation or new user interaction, POC remains strongly recommended.
From €1,500 to €20,000 depending on complexity, materials and number of machined or printed parts. A detailed quote scopes budget before launch.
Not legally required, but strong industrial practice. It avoids discovering a process issue on 500 units.
3D printing for complex shapes and fast iterations; CNC for precision, near-series materials (aluminum, POM) and mechanically loaded parts.
Yes: rapid POC, functional and representative prototypes, then pre-series in digital manufacturing from our Antibes workshop.
