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Overview

DFMA (Design for Manufacturing and Assembly) and design review are both about finding problems before the design is locked — DFMA by checking geometry against manufacturing and assembly constraints, design review by checking the design against requirements, standards, and the judgment of other engineers. Nexus runs both directly on your CAD models: it flags problem areas, explains why they’re a problem, and can apply the fix. It can also prepare and run the review itself — comparing revisions, checking against a requirement set, and producing a findings list for the meeting. What normally takes hours of manual review can be done in a single prompt.

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DFMA

The most common DFMA variants:
  • DfM — Design for Manufacturability
  • DfA — Design for Assembly
  • DfS — Design for Sustainability
  • DfR — Design for Reliability

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What Nexus can help with

  • DfM — Identify features that will be difficult or expensive to manufacture: undercuts, thin walls, sharp internal corners, non-standard tool sizes, insufficient draft angles.
  • DfA — Flag components that are hard to access during assembly, have no clear insertion direction, or require special tooling.
  • DfS — Estimate material usage, identify overbuilt sections that can be lightweighted, and flag high embodied-carbon materials.
  • DfR — Identify stress concentrations, fatigue-prone geometry, and features likely to fail under repeated loading.

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Example prompts

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Design review

A design review checks the model against requirements, standards, and previous decisions — not just manufacturability. Nexus can prepare the review package, run the requirement checks, and diff revisions so the meeting starts with a findings list instead of a blank model.

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What Nexus can help with

  • Requirement compliance — Check the model against a written requirement set and list every feature that doesn’t comply.
  • Revision comparison — Diff two versions of a part or assembly and summarise what changed: geometry, mass, dimensions, custom properties.
  • Review packages — Generate the summary document a review board expects: overview, open questions, DFMA findings, and requirement compliance in one place.
  • Open-question tracking — Surface areas of the design that are ambiguous, underspecified, or depend on an assumption that hasn’t been confirmed.

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Example prompts

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Tips for DFMA and design review prompts

  • Name the process — The rules for CNC differ from injection moulding, casting, or 3D printing. Always state the manufacturing process so Nexus applies the right checks.
  • Specify standards — Include tolerancing standards (ISO 2768, GD&T) or internal guidelines if relevant.
  • Attach the requirements document — For compliance reviews, attach the actual spec rather than restating it from memory — Nexus checks against what’s written, not what’s implied.
  • Ask for a prioritised list — Nexus can rank issues by severity, cost impact, or ease of fix.
  • Apply the fixes — After reviewing the list, prompt “apply the highest-priority fixes” and Nexus will make the geometry changes directly.
  • State what changed, not just what to compare — When diffing revisions, mention any context (a customer request, a failed test) so Nexus can flag whether the change actually addresses it.