10x quote gap: Class-A surfaces and T1 mold support vs render-only

The same appearance brief can be quoted at five thousand and at fifty thousand, and both can be honest. They are not the same product. They differ along three lines, and if you do not align those lines, you are not comparing prices, you are comparing numbers that happen to be written in the same currency.

Delivery depth

Five thousand yuan buys one or two form directions, rendered images, and a basic 3D reference. It suits internal kickoff decks, packaging renders, and small modifications to an existing public-mold shell. Designers at this tier generally do not touch structure, and the quote does not include it. That is not corner-cutting, it is the product definition.

Projects go wrong when the buyer assumes five thousand contains fifty thousand of content. The renderings go to a tooling shop, and the shop asks where the undercuts are, where the parting line runs, who modelled the snap fits. Nobody can answer. Rescuing that situation after the fact typically costs 1.3 to 1.8 times the original design fee, because the missing work has to be reconstructed from a shape that was never built to be manufacturable.

Responsibility end point

A full-package quote is really three things: design hours, validation rounds, and a risk reserve. Two prototype rounds, two mold-trial visits, and two revision rounds written into the contract mean the project probably will not produce a surprise invoice. The risk reserve buys exactly that certainty.

Cheap-plus-metered contracts look different line by line. A revision round is 3,000. An extra prototype is 5,000. A mold-trial visit is 4,000. Each line is reasonable, and the completed project often costs more. What clients dislike is not being charged, it is being surprised, so the boundary should be drawn explicitly: in-scope changes are free, out-of-scope changes (reversing a direction, adding an SKU, altering an approved surface) have published prices.

The middle band

Most real orders land between fifteen and thirty thousand: appearance plus structural hand-off, manufacturable data, no long mold-trial support. Within that band the spread comes almost entirely from how far the structural hand-off goes. Some vendors produce stacking diagrams only. Some deliver full screw bosses and snap positions. Some include a design-for-manufacture report.

The practical move for a buyer is to send a three-line brief to every candidate: what deliverables, how far the responsibility runs, how changes are priced. The same brief to five vendors produces comparable quotes. A one-line request for "an appearance, how much" produces five numbers that cannot be compared at all.