Stage 2: Right Prototypes
Last updated: · Published by Cydney Mar
To develop a product prototype, decide what it must prove, then make the simplest version that proves it.
Right Prototypes is the second stage of the Concept-to-Reality Pathway in The Product Development Roadmap, published by Cydney Mar. The goal is to develop the right samples and cut costly rework, so every round answers a real question instead of creating a new one.
Start prototyping once the product is clearly defined, not before. Cydney Mar lists jumping into sampling without clarity as the first reason product ideas stall. A prototype made from a vague brief tests the factory's guess, not your idea.
If you are not sure the product is defined yet, return to the product development roadmap and finish Product Clarity first.
| Round | What it tests | Who usually makes it | Done when |
|---|---|---|---|
| Concept prototype | Look, size and basic function | Founder, maker or model shop | The idea works as intended |
| Development sample | Materials, construction, fit | Factory or sample room | Specs in the tech pack are confirmed |
| Pre-production sample | Final materials and production methods | Production factory | You approve it as the standard |
Numbered procedure
Prototype costs vary widely by category, material and number of rounds, so this guide does not quote one figure. The cost you control is rework. Every unclear instruction tends to add another round.
The F Word, a tech pack tool vendor, frames the stakes as whether a sample arrives in 10 days or 10 weeks (The F Word).
Ask two or three makers for written sample pricing based on the same specifications. Confirm how many rounds are included and what each extra round costs.
The tech pack format guide shows how to write specifications that keep prototype rounds short.
Short answers below. The full product development FAQ answers 48 founder questions.
You develop a product prototype by deciding what the prototype must prove, then making the simplest version that proves it. Early rounds test look and function; later samples test materials, fit and factory capability. Cydney Mar calls this stage Right Prototypes: developing the right samples so you cut costly rework instead of paying for rounds that teach you nothing.
More answers in the FAQA prototype is an early version used to test an idea, while a sample is usually made by or for the factory to confirm how the product will be produced. In practice founders often go through a proto, a revised sample and a pre-production sample. Each round should close specific questions noted in the tech pack.
More answers in the FAQMost products need more than one round, and the number depends on how complete your specifications are at the start. Vague instructions create more rounds. Clear measurements, materials and construction notes in a tech pack shorten the cycle. Ask your factory how many rounds their quote includes and what each extra round costs.
More answers in the FAQNo, sampling before the product is clearly defined is one of the most common and expensive mistakes. Cydney Mar lists jumping into sampling without clarity as the first reason product ideas stall. Define the customer, the function and the target cost first, so each sample tests something specific and the factory has clear instructions.
More answers in the FAQPrototype costs vary widely by category, material and the number of rounds, so this guide does not quote a single figure. The reliable way to lower the total is to reduce rework with clear specifications. Ask two or three suppliers for written sample pricing based on the same tech pack so you compare like with like.
More answers in the FAQFounders commonly use non-disclosure agreements and keep design files organized, but the right protection depends on your product and country. This guide does not give legal advice. Speak with a qualified lawyer about agreements, trademarks and any patent questions before you send detailed files to suppliers.
More answers in the FAQCydney Mar helps founders move from idea to a production-ready product through the Concept-to-Reality Pathway, drawing on 45+ years of experience and $300M+ in global product sales.
Back to the full product development roadmap