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In product development, cost isn’t just material and time — it’s machine passes, tool access, tolerances, fixturing, and how cleanly a part moves through fabrication.

When CAD models fail after a simple dimension change or imported geometry becomes unmanageable, productivity tanks. The fix usually isn’t more complexity — it’s better fundamentals. This guide highlights five of the most common design mistakes and the practical steps that keep your models clean, stable, and future-proof.