Whether a product is viable, before you have an opinion about it

Most product research is conducted in the wrong order: excitement, then sourcing, then — late, and reluctantly — arithmetic. Reversing the order costs an afternoon and saves the money.

Gate 1 — Is there a price the market will accept?

Observe listings for comparable items and take the median and the band, as in the previous lesson. If no comparable listings exist at all, that is not a gap in the market by default; the prior probability is that the item does not sell, and you now need a reason to believe otherwise.

Gate 2 — Does the landed cost leave anything?

Build the full landed cost. Compute contribution per order at the median observed price. A product that yields less than roughly £12–£15 of contribution per order is very difficult to acquire customers for through paid channels at typical conversion rates, for reasons the next lesson makes exact. That is not a rule of nature; it is the arithmetic of what a click costs.

Candidate A: median observed £29.00, landed £10.18
  contribution = £18.82   → proceed

Candidate B: median observed £14.50, landed £9.90
  contribution = £4.60    → stop here

Why B stops: at a 2% site conversion rate, £4.60 of contribution
buys at most 4.60 × 0.02 = £0.09 per click. No paid channel
delivers relevant clicks at nine pence.

Gate 3 — Is the shipping physics survivable?

Weight, volume and fragility set outbound cost, return cost and damage rate simultaneously. A large, light, fragile item is the worst case: it is priced by volumetric weight, it breaks, and it costs as much to bring back as to send. Check the packed dimensions against carrier bands before anything else physical is decided, because a single centimetre can move an item into a more expensive band.

Gate 4 — Can it be differentiated at all?

If the item is identical to a dozen listings and the only available variable is price, the equilibrium is that margins are competed away, and the winner is whoever has the lowest cost base — which is not you. Differentiation can be the product, the bundle, the guarantee, the delivery promise or the audience served. It has to be something, and it has to be something you can state in a sentence a customer would care about.

Gate 5 — What is the cost of being wrong?

Determine what a failed test costs before running it: minimum order quantity, tooling, custom packaging, exclusivity commitments, ad spend to reach a decision. A product that requires £4,000 of committed stock to learn anything is a different proposition from one that requires £300, even at identical margins. Prefer the candidate that lets you be wrong cheaply and find out quickly.

Figures in this lesson are illustrative inputs chosen so the arithmetic can be checked. They are not measurements. What FlowFinds Solutions actually measures is published, with its artifacts, in research.