Rapid Prototyping Techniques For Agile Teams

Faster than FedEx! (a rapid prototyping success story) Several years ago we were working on a medical project involving a plunger / punch mechanism that had a diaphragm seal in the center. I had sketched up a design, thinking about how we would manufacture it (from the start) we found some silicone diaphragm valves from a vendor and they had 6-day shipping. in this case we didn't want to wait around to see if the idea worked. so we fired up the #formlabs SLA printer and printed these little compression molds, with 3mm dowels that we had on hand (for alignment of the two mold halves). I squished some jewelry casting #silicone between the molds and waited 15 minutes. total time, start to part, was about 6 hours that includes sketching, CAD, printing the mold, molding the parts, and testing. we quickly validated that this design idea would work, the assembly strategy would work, and functionally it would work once we had the right silicone materials. so now we could wait the one week lead time with less risk to the schedule I've also successfully used FDM molds with this casting silicone also... you just get a few more layer lines on the surface. so if you're not looking for a watertight seal FDM printing works also. but why do we care about speed in product development? is it because we're impatient? no, will maybe partly... it's because the only asset we can't replace is time. if I wait a week or two to make a design decision that week or two is gone. forever. we can't buy it back. so now your project will be 1 to 2 weeks late hitting the market. and that has real revenue implications. does that matter? maybe not if it happens once, but in R&D we're making hundreds of decisions. if every decision takes a one or two week lead time to make, we can set ourself back months, or years. think about ways to short circuit your exploration cycle. figure out what works as early as possible using the crudest means possible. test rigorously so that in 2-3 months from now you can look back and say "yes we are on the right track, because I identified these high-risk areas and tested them early." don't wait until your entire product is designed and documented to start testing your ideas. test individual bits and pieces of your concept as you are designing it. prototype (in parallel) several different variations and when you pick one you will feel confident that you have explored other options. and if you're stuck trying to figure out how to rapid prototype your ideas, call me or shoot me a DM and I'll help 763-344-1308 #rapidprototyping #design #engineering

Show, Don’t Tell: Vibe Prototyping Is the New PM Superpower I've shipped hundreds of features—from tiny ones like tags to major launches like Rescale’s AI Physics—and one thing holds true: prototypes beat specs. Every time. Now, with AI, you can prototype at the speed of thought. I call it Vibe Prototyping—a way to build and validate product vibes before real investment. Using tools like ChatGPT and Replit, you can go from insight to working UI in hours. Here’s how I do it: (1) Extract needs (<1h): Use ChatGPT DeepResearch to synthesize user insights from Reddit, support tickets, research, etc. (2) Draft a spec (1h): Write your vision, constraints, and references, then turn it into a detailed PRD with ChatGPT. (3) Generate a working prototype (1h): Feed the spec into Replit and get a working prototype in minutes. (4) Validate the need (days): Share with users, design, and stakeholders. Iterate fast. Why this matters: - Speed > Slides: You validate in hours, not months. - AI is the new IDE: It turns your intent into working code instantly. - No prototype = no meeting: Talking in abstract is a waste. - This is the new PM stack: Ignore it and get left behind. Agile is starting to feel like waterfall. The future isn’t more process—it’s better intuition, faster loops, and showing instead of telling. Even companies like Shopify are shifting to this. PMs who build prototypes will ship 10x more, with 10x less friction. The rest will be stuck writing PRDs no one reads.

Product managers used to overbuild in pursuit of perfection. Then we overcorrected, with raw MVPs. Today, AI prototyping gives us the tools to build better products—faster, and with more confidence. For years, validating ideas early was the goal—but it took too long. So we skipped discovery. We overbuilt based on gut. And we launched late—only to learn we were wrong. Then came MVPs. We shipped faster—but often learned less. Too lean to deliver value. Too early to earn trust. Today, there’s a better way: AI prototyping is unlocking the Build Smarter Loop. It’s a faster, more confident path to product learning: 1️⃣ Prototype to test assumptions -> Use AI prototyping tools (like v0, Bolt, Replit, Lovable) to quickly mock up key flows, feature ideas, and messaging. -> Validate your riskiest assumptions with internal teams, user testing platforms, or lightweight customer interviews—before you involve engineers. 💡 Catch bad bets early and explore multiple options without heavy lift. 2️⃣ Deliver a better product—faster and with more confidence -> Ship a lean version designed to validate learning goals, not just to “check the MVP box.” -> Because your discovery was fast and informed, your build is focused, intentional, and aligned. 💡 You launch faster without guessing—and with buy-in from users and stakeholders. 3️⃣ Learn and refine continuously -> Instrument usage to track how users interact with your product—ignore what they say, watch what they do. -> Close the loop by feeding these insights back into both your roadmap and your next round of prototyping. 💡 Every iteration gets sharper, driven by data—not gut feel. Final thought: AI prototyping enables you to improve what you launch—and how quickly you learn from it. — 👋 I’m Ron Yang, a product leader and advisor. Follow me for insights on product leadership & strategy.