DJDevon Design JournalIdeas made tangible

Prototyping

Review fit with the whole assembly in mind

A part can look correct alone and still be difficult to integrate.

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

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

Check the relationships

Consider the parts, interfaces, access and sequence involved in assembly. Use a prototype appropriate to the question and explain its limitations. A visually convincing model may not represent production variation or final materials. Bring the people who will assemble or service the product into the review where appropriate; they may notice practical constraints that a standalone rendering does not show.

Record the integration questions

Note where alignment, tool access or component variation needs further assessment. Separate observations from proposed fixes and update the controlled design through the agreed process. Avoid forcing parts together merely to obtain a successful demonstration. A fit review should reveal whether the relationships are understood, not create a temporary appearance of compatibility that disappears during real assembly.

A practical review checklist

  • Review the assembly sequence.
  • Explain prototype limitations.
  • Record access and alignment questions.

Further reading

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