There is a version of product development that goes: idea, sketch, prototype, manufacturer. A lot of founders try to run it in that order. Most of them hit an expensive wall somewhere between prototype and manufacturer.
The wall is almost always the same thing: the numbers never worked, and nobody checked.
Before a single design decision gets made, three questions need clear answers.
What does the market pay for products like yours? Spend a few hours mapping five to ten competing or adjacent products and their retail prices. That range is your ceiling. Every design decision you make has to land you under it.
What does it cost to make at your target volume? The landed cost of a consumer product, which includes manufacturing, freight, duty, compliance testing, packaging, and fulfilment, typically needs to sit at 20 to 30 percent of the retail price to leave a workable margin. At $49 retail, that means $10 to $15 landed. Figure out early whether your product can get there.
Where does your margin actually sit? Once you have both numbers, the gap between them is not profit. It is the budget for marketing, returns, platform fees, and growth. If the gap is thin, the design needs to change, not the business plan.
These three questions are the design brief. Skipping them does not save time. It spends it on a product that will not survive contact with the market.
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