002 the harsh reality of scaling your product from prototype to production.
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002 the harsh reality of scaling your product from prototype to production.
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✅ Cheat sheet: 👉 https://shorturl.at/5qSGX www.rebeleng.us If your prototype worked perfectly on your desk, that’s exactly why it might fail in mass production. In this video, I explain why prototypes lie — and how manufacturing exposes every shortcut you took. We cover the biggest mistakes first-time physical product founders make when moving from prototype to production, including tolerance stackup, material changes, 3D printing vs injection molding, tooling costs, assembly errors, and production speed. A prototype proves an idea. Mass production proves discipline. If you're bringing a physical product to market, this will help you avoid costly rework, blown tooling budgets, and painful manufacturing delays. ⏱️⏱️VIDEO CHAPTERS⏱️⏱️ 0:00 – Why Prototypes Fail in Mass Production 0:52 – The Prototype Confidence Trap 1:12 – Proof of Concept vs Production Reality 2:03 – Variation, Tolerances & Why Parts Stop Fitting 2:29 – 3D Printing vs Injection Molding Problems 3:25 – Assembly Errors in High-Volume Manufacturing 4:19 – Tolerance Stackup & Six Sigma Explained 4:44 – Material Changes That Break Working Designs 6:54 – Tooling Costs, Undercuts & Manufacturing Risk 10:55 – The Mindset Shift: Design for Learning, Not Completion