Start Roto #20 | Operational traceability: technical data sheet, work order, batch and history

What you gain by watching

• Understand how to build a technical data sheet, SOP, work order and batch control to trace any part from the mold to the raw material.
• See how to use Ishikawa and the five whys to find the root cause of irregular thickness, bubbles and poor pigmentation.
• Learn how to turn operational records into margin, less scrap and delivery confidence — including with training tailored to your factory.

Episode chapters

1. 1

   We're back on air with technical content straight from the factory floor

   After some time away to finish tools and prepare the course that will put students right at the machine, we're back live to resume the technical conversation with those who live rotomolding day to day. It's in this exchange of experiences, of questions, and even of stories about a badly positioned burner, that we build the content we wish we'd had when we were struggling at the beginning — and that now arrives for free, in theme-based clips, on each person's own time.

   Our mission is to deliver knowledge, yeah, in a free and technical way, right, to all companies

   ▶ Watch at approximately 8:33
2. 2

   Operational traceability: what separates selling more from selling with quality in rotomolding

   We found that rotomolding still represents only 2 to 3% of all resin processed in Brazil, and that's exactly why scaling without operational traceability doesn't hold up — selling more isn't the same as selling with quality. In this chapter of Start Roto, we show how this scale track closes the series and opens up a range of tools and frameworks so you can see what happens inside your process, your product, and your productivity.

   Scale isn't just about selling more, it's about selling with quality

   ▶ Watch at approximately 13:45
3. 3

   Operational traceability: what to do when the customer calls and you don't know where the part came from

   Have you ever thought about sending a batch to a customer and, when they complain, having no idea where the problem came from? In this excerpt from Start Roto, we went back to basics to show why operational traceability makes a difference in productivity and product quality — and Jucemar told a real case of a part sent without knowing its origin, which turned into a batch replacement and a headache. Before that, we even had to rewind the tape because the sound only came back after twenty minutes, but the talk about process, step by step, and how to bring a product to market really got started.

   You really, when there's a problem at the customer, you know where the root was, so you can chase it down… even to reach a customer and know how to explain it to them, because I've already had a case like that of sending a part to a customer and then not even knowing what happened, having to replace a batch.

   ▶ Watch at approximately 18:48
4. 4

   The loss the factory swallowed for not knowing where the raw material came from

   The company had to absorb the loss because it didn't even know where it had bought the material from, and it's exactly this traceability blackout that we attack by bringing in the Ishikawa diagram — or fishbone — to separate the variation into the four Ms: machine, mold, method, and raw material. With simple records, the part that came out different stops being a mystery and starts having an identifiable cause, which also applies to those living with maintenance, as we showed with the case of the general factory shutdown where scheduling had to run like clockwork.

   The company itself had to absorb the loss. Why? Because it didn't even know where it had bought the material from.

   ▶ Watch at approximately 24:04
5. 5

   A 300 kg part without a serial number is a risk nobody wants to take

   In a conversation about large and critical parts — those of 150, 300 kg that carry chemicals and added value — the question left hanging was: how do you guarantee that, if something goes wrong at the end of the line, the customer knows exactly which part failed? That's when we showed why part-by-part traceability, with a serial number on the datestamp itself, stops being a detail and becomes a technical commitment — and, more than that, trust delivered along with the product. And we also talked about how it must be recorded: technical datasheet, SOP, production order, batch, and that incident log that, if nobody looks at it or dates it, makes the factory lose its reference and rely only on memory.

   ▶ Watch at approximately 29:24
6. 6

   The technical datasheet that saves the mold — and the customer

   Have you ever stopped to think how you'll reproduce that part six months from now if the mold was thrown in a corner and you didn't write anything down? We talked with Júlio César about the technical datasheet that must accompany each mold — raw material, color, target weight, identification number — and we told the case of a customer with eight molds who didn't even know which number corresponded to which part. The difference is simple: with identification and a datasheet, you trace the defect to the right mold and give confidence to the retailer who buys your batch.

   If you have a technical datasheet, you already know right there how that product needs to be made, the specifications it needs to have

   ▶ Watch at approximately 34:25
7. 7

   The SOP that takes the cycle out of conversation and puts everything on paper

   Do you know in which shift cycle that batch of food parts was produced? Without this control, how can you trace a contamination or find the cause of a defect? That's why Júlio César dove headfirst into the SOP: at the first plastics factory where he worked, nobody knew the process, and he learned by writing down every step — from the mold to the hoist, from the right machine for each part to cooling cleaning — until he proved that anyone, even someone who had never seen an injection molding machine, could change the mold by following the procedure.

   The SOP takes the cycle out of conversation and puts the method on paper: charge, oven, cooling, demolding and finishing

   ▶ Watch at approximately 39:31
8. 8

   Without an SOP, the factory becomes hostage to whoever knows

   We've already heard on the factory floor the phrase that scares any rotomolding owner: "if I leave here, the factory stops". That's why we put together the standard operating procedure for all sectors, because nobody should be depending on one person's memory alone. And the message is direct: nobody is irreplaceable as long as you have technical mastery of what you do — when you outsource your decisions, you become a hostage, just like the guy in the book who handed his money to someone else to buy jewels and came back with glass in hand.

   Nobody is irreplaceable within the company, as long as you have mastery of what you do, because when you outsource your decisions, it's complicated

   ▶ Watch at approximately 44:36
9. 9

   Duplicate batch, missing part and the reform arriving in 2027

   We've already lived through the nightmare of producing a hundred parts, the truck arriving and the product being short because sales pulled five units out of the batch without telling anyone — and what's left becomes scrap from a technical development that can't be sold. That was the cue to remember that without batch control and communication between production and sales the loss is certain, and that the same lack of preparation will knock on the door in 2027 with the tax reform, when even MEI and liberal professionals will need a CNPJ and tax compliance to avoid fines or losing ICMS credits.

   There was no control at all. So how important it is for you to have this control

   ▶ Watch at approximately 49:39
10. 10

    A forgotten superproduction and the mold release that kills everyone

    Ever thought about ending the shift leaving an improvement made on the machine and nobody knowing? It mirrors what happens when production forgets to pass the request along and leftover parts nobody will sell remain, or when there is a lack of control over the operational order. We show why the fourth record — batch and inputs — is what saves you: it's not enough for the resin to be non-toxic if the mold release isn't, and there's a case of a machine for the food sector that went to market with a carcinogenic product, without anyone paying attention.

    Oh, this resin here is non-toxic, and all, no problem, you can put it in. Then you put a mold release in there that kills everyone

    ▶ Watch at approximately 54:41
11. 11

    The night shift changed the temperature and nobody told anyone

    Someone messes with the machine so their own shift produces more and, on leaving, leaves everything out of parameter — and the next shift only finds out when two arms of parts have already been burned. That's how we learned, in practice, why the occurrence log and the visible management board exist: the night crew compensated the temperature on that cold day and didn't record it, and the first batch the next day came out burned, costing forty-five minutes and three arms in losses until someone understood what had happened.

    The night crew, since it got cold that day, had to compensate the temperature there and didn't record it. Didn't record it.

    ▶ Watch at approximately 59:48
12. 12

    A resin increase doesn't have to become a customer increase: the margin that holds the price

    When resin goes up, the natural reaction is to pass the increase straight to the customer — and that's what we saw happen with many companies that lost competitiveness because of tight margins. That's when the conversation turned: if your margin is good, you can hold the price until the market adjusts, because every adjustment in the process becomes a real improvement, and it was precisely that fine control that we brought to the machine side during the two days of the course, with a theory day and practice to see the problem before it reaches the customer.

    If you avoid it, you reduce your cost, you'll increase your profit margin, keeping the same price.

    ▶ Watch at approximately 1:04:59
13. 13

    The part came out deformed: how the Ishikawa diagram helps find the cause in rotomolding

    Have you ever had that part that comes out with completely irregular thickness, reaching less than three millimeters at one point and almost fifteen at another? That was the real problem we dissected with the Ishikawa diagram in Miro, showing how to eliminate hypotheses — mold, temperature, geometry — until reaching the poor material distribution. And before that, we already teased: Friday there's a conversation about micronization with someone who has been in the market for a long time and will reveal a detail that, even after twenty years of rotomolding, we hadn't noticed.

    I said: "Wow, I've been in the market for twenty years, I hadn't noticed this small detail

    ▶ Watch at approximately 1:09:59
14. 14

    The four links that explain almost every defect in rotomolded parts

    When the defect appears in the part, the question that stalls the factory floor is always the same: where to start investigating? We showed that you can organize everything into four links — mold, machine, method, and raw material — and within them come everything from the mold geometry and temperature measurement in the wrong place to the lack of machine reversal, misaligned rotation and translation, the poorly positioned air circulator, and a material flow that doesn't match what the part requires.

    ▶ Watch at approximately 1:15:09
15. 15

    Poorly done cold pigmentation becomes a weak point in the part

    That bubble that appears in the part isn't always empty: many times it's pigment powder that wasn't diluted properly, forming pellets that stick to the material and disrupt the entire distribution — and we told the case of a cold-pigmented batch where heating and mixing were missing. The point that remains is that the root cause almost always lies in the lack of knowledge and training, and that's what the five whys tool reveals until we get to what really needs to change in the company.

    Because it can generate lumps, you know, that wasn't properly–

    ▶ Watch at approximately 1:20:15
16. 16

    Machine reversal and a map to hunt down the root cause

    We were facing those defects that insist on showing up, and we showed how reversing the machine changes everything when the material needs to fall on both sides, with exact time and number of turns, plus a thermal distribution that even showed a sixty-degree difference in the mold. To avoid guessing, we introduced the Fishbone diagram as an organizing tool — machine, mold, method, and material, one by one — reminding everyone that it works best when it becomes a brainstorming session among the team.

    If you don't have traceability, you don't have control over anything, how are you going to know, exactly whether the material is suitable?

    ▶ Watch at approximately 1:25:24
17. 17

    Training at your company: when the savings pay for the investment

    The question was clear: can you train the team without pulling everyone out of their routine and still get a discount? We showed that you can — the more people from the same company, the bigger the progressive discount, reaching 33% starting with three people, and the course can even take place inside your factory, adapted to a real problem that we identify together with you. The math works out when that improvement turns into savings: we've already projected, on paper, an annual reduction of 500 thousand reais in just one product from one company.

    We take a pre-identified problem at your company, adapt the course content to focus specifically on that, and solve that problem together with your team

    ▶ Watch at approximately 1:31:01