One Prototype Is Easy. Building Fifty Is a Different Story.

We’ve had people bring us a prototype and say, “This is exactly what we want. Now we just need 50 of them.”

Great.

Except making one part that works and making 50 parts that all work exactly the same are two very different jobs.

A prototype really only has to prove that an idea works. You can spend an hour getting something lined up perfectly, tack it together, realize you’re off a little bit, cut it apart, move something, weld it again…and eventually you end up with a part that does exactly what it’s supposed to do.

If we’re making 50 of them, we can’t do that 50 times. Well…we can. You’re just not going to like the price.

That’s where the conversation changes from “Can we make this?” to “How are we going to make this over and over again?”

The First One Gets Away With a Lot

Prototypes are supposed to be a little inefficient. That’s kind of the point. You’re figuring things out.

Maybe the drawing says a hole needs to be here, but once everything is assembled we realize it really needs to move over an eighth of an inch. No big deal. Move the hole. Maybe a bracket is a little too long, so we trim it. Maybe something is difficult to weld because there’s barely enough room to get the torch in there, but we manage to do it anyway.

At the end of the day, the prototype works.

The problem is that none of those little fixes magically appear on part number two.

If I had to remember that I trimmed 3/16 off this piece, drilled this hole slightly oversized, clamped this corner first, and held my tongue just right while I welded the other side…we don’t have a production process. We have a guy who figured out how to make one part.

That’s fine for a prototype. It’s a terrible way to make 50.

Part Number Two Is Where You Start Learning Things

This is something I’ve noticed over the years…the first part tells you whether the idea works. The next few tell you whether you actually know how to build it.

Once you’re making multiples, all those little decisions that didn’t matter much on the prototype suddenly matter a lot. What order do the pieces get welded? Where does the heat go? Do we need a fixture to keep everything in the same place? Can we change a dimension so we’re using a standard material size instead of cutting every piece down? Is there a bend we could add that eliminates two welds?

And here’s another one people don’t always think about…can somebody other than the guy who built the prototype make the next one?

That’s a pretty good test.

If the only way to make the part correctly is to hand it back to the same person and say, “You remember what you did last time, right?”…we probably need to do a little more work before we call it production-ready.

Fixtures Start Making a Lot More Sense at Fifty

Let’s say we’re making one welded frame.

I can measure everything, clamp it to the table, check the diagonals, adjust it, check it again, tack it together, check it one more time, and then weld it.

That’s perfectly reasonable for one. Now let’s do that 49 more times.

At some point, spending a few hours building a fixture starts looking pretty cheap.

A good fixture does a couple things. It makes the job faster, obviously, but more importantly, it makes the parts consistent. Instead of measuring the same dimension over and over, the fixture puts the piece where it belongs. Instead of hoping part 37 looks like part 4, we give them both the same physical reference points.

The funny thing is that customers sometimes see tooling or fixture costs on a production quote and wonder why they have to pay for something that isn’t actually part of the finished product.

Because that thing you’re not taking home might be the reason all 50 things you are taking home actually match.

Sometimes We Need to Change a Perfectly Good Prototype

This can be a weird conversation. You bring us a prototype. It works. Everybody likes it. You’ve tested it. Maybe you’ve already shown it to customers.

Then we start suggesting changes.

We’re not necessarily trying to change the product. We’re trying to change how the product gets made.

Maybe we can turn three pieces into one bent piece. Maybe moving a hole half an inch means we can reach a weld that was miserable on the prototype. Maybe there’s a piece somebody spent 20 minutes machining that could have been made from an off-the-shelf component.

None of that makes the prototype “wrong.” It just means the person who designed it was trying to solve a different problem.

The prototype answered, “Will this work?” Now we’re answering, “Can we make this efficiently and consistently 50 times?”

Those aren’t the same question.

Fifty Isn’t Really Mass Production Either

Here’s another wrinkle…50 parts lives in a funny middle ground.

We’re not Ford.

We’re probably not going to spend $100,000 building dedicated tooling so a robot can spit your part out every six seconds. There aren’t enough parts to justify it.

But 50 is enough that we absolutely should spend some time thinking about repeatability.

That’s where small production runs get interesting. We’re trying to find the point where a little upfront work saves a lot of labor later without going completely overboard.

Maybe that’s a simple welding fixture. Maybe it’s having a batch of pieces laser cut instead of making them individually. Maybe it’s changing the design slightly so everything bends from one blank. Sometimes it’s something ridiculously simple…like drilling two holes in a piece of scrap and using it as a template.

You don’t need an assembly line to make production smarter. You just need to stop treating every part like it’s the first one.

Bring Us In Before You Need Fifty

If you know there’s even a decent chance your prototype is going to turn into a production run, it’s worth talking to your fabricator early.

Not because we need to redesign your product. We just look at it differently.

You’re thinking about what the part needs to do. We’re also thinking about where we’re going to put the clamps, how we’re going to get a welding torch into that corner, whether that bend is actually possible, how many times we’re going to have to flip the thing over, and what happens when we have to make another one tomorrow.

Sometimes a five-minute conversation during the prototype stage saves a surprising amount of work later.

And sometimes the prototype is already perfect.

We build a fixture, order the material, and start making parts. That’s great too.

But if you’ve got one handmade prototype sitting on your desk and you’re ready to order 50 more…don’t assume the next step is just multiplying everything by 50.

That’s usually where the interesting part starts.