Getting the first prototype working feels like a major victory.
It is.
But a prototype that works once is not automatically a production-ready product.
Production introduces new questions.
## Can the part be made repeatedly?
A prototype may be hand-finished, adjusted or assembled carefully.
Production needs repeatability.
Ask whether the process can consistently produce the required dimensions and performance.
## Review tolerances
Prototype teams often compensate manually.
Production cannot depend on an operator filing a part until it fits.
Functional tolerances should be understood before the design is frozen.
## Review the manufacturing process
The production process may differ from the prototype process.
A prototype might be 3D printed while production uses injection moulding.
A prototype bracket might be machined while production uses sheet metal.
The design needs to be checked against the final process.
## Supplier feedback matters
The manufacturing supplier sees problems that may not be obvious in CAD.
Ask:
– Which feature is expensive? – Which tolerance is difficult? – Where does the process vary? – Can the inspection be simplified? – Can the tooling be improved?
## Build a quality plan
Define what must be inspected and how.
Not every dimension needs the same level of control.
Critical characteristics deserve attention.
## The production mindset
A successful prototype proves that the concept can work.
A successful production design proves that it can work repeatedly, economically and consistently.
That is a different engineering challenge—and an important one.