Start Roto #9 | Validating Without a Factory — from Prototype to Safe Outsourcing — LIVE

What you gain by watching

• Learn to validate shape, use, and price with simple prototypes before spending on a mold or factory.
• See how to choose and negotiate with rotomolding service providers without becoming hostage to scrap, delays, or color changes.
• Understand when outsourcing becomes a growth shortcut and how contracts, samples, and inspection protect your operation.

Episode chapters

1. 1

   Validating a rotomolding product without owning a factory

   The rush and anxiety of launching a product often make entrepreneurs skip essential steps to get it to market. That's why we opened the validation stage of Start Roto by showing how to go from paper to market without owning a machine, going through conceptual validation, prototyping, and safe outsourcing to define the right partnerships before investing in manufacturing infrastructure.

   Let's start validating your product

   ▶ Watch at approximately 2:52
2. 2

   From the wooden prototype to the price the market accepts: how to validate before investing big

   Before thinking about a factory or tooling, we show that you can validate shape, size, use, ergonomics, and even price perception with simple materials, such as wood, plaster, clay, or 3D printing — because the prototype doesn't need to be perfect, it needs to provide insights. And we also talk about the technical precautions that no one can ignore, such as the three to four percent shrinkage that requires compensation in the model when the part becomes a casting.

   The prototype doesn't need to be perfect, it needs to provide insights

   ▶ Watch at approximately 7:55
3. 3

   3D printing and usability testing: how to validate a prototype before it becomes a mold

   The doubt that stalls many people on the factory floor is how to know whether the prototype is truly approved before investing in the final mold — and that's where usability tests come in, which work like software validation: you hand the part to the customer and observe whether they understand the value proposition right away. We also talk about when it's worth moving to 3D printing, which already allows printing molds at full size in stages, and how to separate normal adjustment from a real warning sign during this journey. In the end, the point that remains is simple and powerful: it's this moment, with the part in the customer's hands, that reveals whether the product communicates on its own.

   The customer will understand your product right away, and most importantly of all, they will understand the value proposition that product has.

   ▶ Watch at approximately 13:22
4. 4

   How customer feedback reveals what the product needs before it goes to the line

   We always insist that validating the product with the people who actually put their hands on it is what separates a spot-on development from a silent loss — because details like the depth and the angle of the handle on a box that slipped in the operator's hand only show up with the customer giving the first visual impact and actually testing it. We also talk about the pizzeria example, where we put care into the assembly so the customer could eat with their eyes, showing that this critical owner's eye needs to be at every step, from design to usability, without outsourcing validation.

   There's no point in us hearing from whoever is paying for the system or another person who is involved in the company. But no, in the process. Yes, for us, the opinion is always the end user's that carries more weight

   ▶ Watch at approximately 18:25
5. 5

   The one who validates the product is the hand of the worker, not the meeting room

   We always took the parts to the assembly lines of the automakers and watched the people assembling right in front of us, truly testing — and that's when it clicks: no one better than the hand of the worker, who uses the thing on the run and without care, to validate the product. This lesson also came back our way: in an app of ours, a user asked why it wasn't done another way, we changed a core feature and got a headache that only showed how big the mistake was of not listening to the people who use it first.

   No one better than the hand of the worker to, to really test the product, because they're the one who's going to use the thing.

   ▶ Watch at approximately 23:34
6. 6

   Five adjustments on the same mold and the part nobody wanted to approve

   A won bid guarantees nothing when several departments of the automaker need to say 'yes' to the same part — that's how eight visits and a pile of patches piled up until someone had the simple idea of gathering everyone in one room at once. The mold ended up looking like Frankenstein from so much adjusting, but it was precisely by listening to those with the part in their hand, on the assembly line that never stops, that we reached the design that actually passed.

   The one who defined the part wasn't the supervisor, it was the operator

   ▶ Watch at approximately 28:47
7. 7

   Whoever sells the first plane is the pilot: the validation lesson that came from Embraer

   Have you ever stopped to think why, at the launch of an aircraft, the one who goes straight to the press room to give an interview is the pilot — and not the engineer or the salesperson? We tell the case we followed closely during the development of the EMB-145, at Embraer: once the test flight is over, no one interferes with the pilot's conversation, because he is the one who points out the real problems and difficulties of the aircraft. The same logic applies to rotomolding — validating the concept with those who actually use the part is what separates the ideal product from the acceptable product and makes cost planning much more accurate, because, as we said in the episode, not everything that worked out is right.

   ▶ Watch at approximately 33:58
8. 8

   Validate the concept before choosing the material

   The urge to jump straight to plastic can blind us to what really matters: proving that the idea works. That's why we tell the story of the five-wheel cart — if the concept works in metal, swapping the material comes later, with strength and application tests — and we recall the case of the milk cans, where changing the resin supplier changed the volume and required extra care. With the concept validated, the next step is to listen to the customer: asking how much they would pay reveals whether the value proposition really solves their pain point and helps raise the real costs.

   The important thing is that you prove the concept. A five-wheel cart works, now whether it's made of metal, plastic or anything else, is indifferent.

   ▶ Watch at approximately 39:00
9. 9

   How much would you pay? The question that changes the whole spreadsheet

   We talk about a simple question that turned into a valuable insight: in an app evaluation, we suggested charging twenty reais and the client replied they would pay up to one hundred — changing the whole calculation we do in Excel. The thing is, price can't be guessed: when the value proposition is noticeable, like the box that keeps the temperature for twenty-four hours versus the competitor's seven, the market gives signals and demand arises naturally.

   Wow, twenty reais is too cheap, I'd pay up to one hundred reais

   ▶ Watch at approximately 44:05
10. 10

    Before outsourcing, master the product so you don't become hostage to the supplier

    With the concept validated, the time to outsource arrives — but that's where the risk lies: sending the part to a partner without a clear briefing, without a proven track record or without mastery of the process, and ending up hostage to a supplier that delivers out of specification. It was by following real cases, such as that of a client running one-and-a-half-kilogram parts with a partner with no technical knowledge, that we showed you can see the problem before it turns into a loss and correct course with technical preparation and training for those who will produce.

    There's no point in having a partner who is reliable, a partner who is good, yes, but if you don't master the product.

    ▶ Watch at approximately 49:59
11. 11

    When to Accept the Three Hundred Kilos of Scrap Nobody Told You About

    Two tons of material turned into scrap because the buyer had no technical basis to question the producer, and the three hundred kilos of waste per ton that seemed normal to the supplier went straight into the budget of those who trusted too much. That's why we talked about the importance of having knowledge or being well advised, and presented what the Portal offers to change that game: the free rotomolding course on Start Roto, the essential theoretical and hands-on course at the machine, and cases like Anderson's, who started seeing as a defect what he used to think was acceptable — and has already managed to correct it.

    When you don't know a process, right, yeah, any truth for you is absolute

    ▶ Watch at approximately 54:59
12. 12

    A well-drafted contract and agreed-upon scrap: how to negotiate with your rotomolding service provider

    When the service provider is far away, moving your team doesn't solve it — so we showed that the way is to bring the training to their factory and adapt the content to the actual product and process, instead of pushing a generic course. When it's time to close the deal, what protects both sides is a well-drafted contract and a frank conversation about acceptable scrap: sending a ton of material and getting three hundred kilos of parts back is something we've already seen happen, and that's why even 3% or 5% loss is already the limit being exceeded. The negotiation starts with a validated prototype, estimated minimum volume, a deadline that fits your operational window, and a quality standard guaranteed by contract.

    But it's nothing, nothing absurd, right? nothing absurd. Nothing out of touch with reality. It wasn't seventy percent like me and the other two tons there, yeah, of the material That was lost like that, you know?

    ▶ Watch at approximately 59:59
13. 13

    No contract, a 20% increase the day before, and a color changed without notice

    From miscalculated scrap to the supplier who sends lead gray instead of Antarctic gray, what hurts most isn't the failure itself, but the lack of communication: a simple heads-up would have avoided two weeks of headaches and an entire compromised batch. That's why we always advocate for a contract — fixed price per period, quality and deadlines locked in — because no serious company works on improvisation, and anyone who has seen a client suffer from a labor increase the day before knows the size of that risk.

    Wow, Juju, I need to figure something out, because look, the guy came and told me: tomorrow there's going to be a 20% increase. I said: but is material going up? He said: no, it's labor.

    ▶ Watch at approximately 1:05:09
14. 14

    Contract, sample, and the day the water tank blue turned sky blue

    We talked about the supply contract as protection for both sides — minimum quantity, defined deadline, documented quality standard, and penalty for non-compliance — and how this prevents the client from being left unprotected or asking for pieces 'for yesterday'. But what really stood out was the case of the fiber factory that lost its color reference over the batches and only found out when the client complained they were receiving sky blue instead of water tank blue.

    Take a piece, keep it there, leave it as a reference, make a video, take a photo, and preferably keep the piece too, that helps a lot

    ▶ Watch at approximately 1:10:19
15. 15

    Safe outsourcing: when the supplier becomes your growth plan B

    When it comes to outsourcing production, the first question that comes up is: how many units do I need to sell to profit? We calculated cost per piece, minimum viable volume, payback, and gross margin — and that's where the business really begins. With a reliable partner, you gain total focus on selling and growing, immediate scalability by activating a second supplier when orders pile up, but we also don't turn a blind eye: periodic inspection, technical monitoring, and attention to batch-to-batch variation are what protect your operation.

    Outsourcing eliminates headaches, but brings new headaches. Knowing the risks protects your business.

    ▶ Watch at approximately 1:15:21
16. 16

    Cheap scrap that turned into a loss: ground PVC mixed with the material

    A client received a batch of cheap material and couldn't extrude the rod at all — when we looked into where it came from, we found out that the original portable toilet had vacuum-formed sides and, worse, the internal PVC pipe was being ground together with the scrap, contaminating everything with no chance of separation. The lesson we learned is that letting the supplier run wild thinking they'll be careful costs you dearly, and that technical follow-up and a plan B with alternative suppliers are what keep your company from going broke along with whoever supplies you.

    The worst part was that the pipe inside was PVC, the guys were grinding it together. Wow, contamination. Then the whole batch was ruined.

    ▶ Watch at approximately 1:20:21
17. 17

    Outsourcing before buying a machine: the shortcut to validate your product without a factory

    We explain how outsourcing lets you validate a product, gauge acceptance, and gain market share without oversizing factory structure, while buying a new machine can take at least 120 days and a used one requires cash payment. The twist is that, by outsourcing, you get your product to market quickly and can also rely on our WhatsApp group and form to solve real pain points, such as recovering porosity in molds.

    The advantage of buying a new machine is that you have credit lines, financing. But the downside is that it takes at least, at least one hundred and twenty days.

    ▶ Watch at approximately 1:25:30
18. 18

    The rush that stalls the site and the decree already knocking at the door

    We do try to put everything on the site, but the daily rush and how fast things change end up leaving opportunities behind — so if you want details, just reach out through the contact. And before wrapping up, there was still time to remind everyone that the decree is already in effect and that on Friday we'll be back with Rotocast to talk about mandatory recycled content and debunk the myth that recycled material is junk in production.

    We're going to end up debunking that myth that recycled material is junk in your production.

    ▶ Watch at approximately 1:30:58
19. 19

    Two in the morning in Portugal: how far our community goes

    It was already past two in the morning when we realized that Flávio, over in Portugal, was still on the other side, following every minute of what we've built here. That's the kind of dedication that closes out the episode: none of us holds this community alone — it stands because there are people willing to stay up all night with us.

    Flávio over in Portugal, always following along with us there too, sometimes at- From now on. Two in the morning.

    ▶ Watch at approximately 1:36:02