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Prototyping

Let the prototype test one thing well

A focused prototype can produce clearer evidence than a polished all-purpose object.

Devon Design Journal editorial · October 7, 2026 · 3 min read

A sculptural brushed-metal prototype on a softly lit design workbench.

State the learning goal

Decide whether the prototype is exploring appearance, fit, interaction or another defined requirement. Write down what the team wants to observe and which aspects of the prototype are intentionally different from the intended product. A model made for a visual review should not quietly become evidence of structural performance. The value lies in the question it can answer reliably.

Choose the next step from the result

Record the observations before discussing the next iteration. Distinguish a flaw in the concept from a limitation of the prototype’s construction. If a result is uncertain, explain what additional work would resolve it. Do not keep polishing an object that cannot test the intended question. A small purposeful prototype can guide a decision more effectively than an impressive sample with no clear evaluation plan.

A practical review checklist

  • Define one learning goal.
  • Label prototype limitations.
  • Record observations before conclusions.

Further reading

General design-planning material. Actual specifications, machine operation and safety decisions require suitable qualified expertise.