If you mean: “I need the first physical version to see whether the design can be built”
Prototype / development sample
Also heard as proto · development sample · first sample
An early sample used to test design intent, pattern logic, construction approach, approximate material behavior, and initial costing questions.
- Why it matters
- It exposes basic build problems while changes are still relatively inexpensive and before fit, grading, and production details are locked.
- Say or ask
- “What is this prototype intended to prove, which materials are substitutes, and which decisions are explicitly not ready for approval?”
- Boundary
- Sample-stage names vary. Define the decision and inputs rather than assuming every supplier means the same thing by proto.