Part sorting is the 100% inspection of a suspect lot to separate conforming from nonconforming material and contain a quality problem. RIDYS Group provides this service at automotive plants in San Luis Potosí and the Bajío region, with per-shift reporting.
It is triggered in three scenarios. The customer detected a defect on their line and the inventory already shipped must be contained. A process deviation was identified and it is unknown which part of the lot was affected. Or there is held material blocking production that must be released with documented criteria.
In all three cases, the clock is running. What separates a useful part sorting service from one that only costs money is start-up speed and the quality of the records.
We perform automotive part sorting at the customer’s plant or in a warehouse, with our own personnel, on-site supervision, and the criteria the customer approves. We are ISO 9001:2015 certified and REPSE (Mexico’s Registry of Specialized Service Providers) registered.
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An inspected part and an uninspected part look the same.
That is why every part that goes through our part sorting carries a verification mark: a colored dot, a label, or a stamp, as the customer authorizes and the material allows. The mark is not decorative — it is evidence that each individual unit was evaluated against the criteria.
The color or code changes by shift or by lot, so if a complaint appears later, it is possible to identify in which run that part was inspected and under which criterion.
Without a check mark, the only evidence of the service is the report, and the report talks about the lot, not the part. When the customer asks for a specific unit, the mark is the only thing that answers.
Comparing part sorting suppliers by hourly rate is comparing half the equation.
The other half is the defect criterion: what is considered nonconforming and what is not. Two suppliers with the same rate can deliver incompatible results if one rejects under a stricter criterion than the other. And a poorly defined criterion causes two problems: good material rejected, which is a direct cost, or bad material released, which is a problem at the customer’s plant.
Before starting any material sorting service, we define the criteria with the customer in a work instruction, with physical limit samples when the defect is visual. That instruction is signed, and it governs the service.
The rate is quoted per person per shift and includes supervision, marking supplies, and reporting. Travel time and special equipment are quoted separately when applicable.
As quality sorting company based in San Luis Potosí, we schedule the start according to the urgency, shift, and volume of your requirement, and adjust staffing to the operation.
For Aguascalientes, Querétaro, and Guanajuato, we coordinate the start with our own transportation on the date agreed with your plant.
Per-shift report with quantity inspected, conforming, nonconforming, and the breakdown by defect type. Identification of inspected material with a verification mark. Physical segregation of nonconforming material. And, when the customer requires it, data segmented by shift, lot, or position to feed their root cause analysis.
Management system certified to ISO 9001:2015 and REPSE registration ARR197/2024 with Mexico’s Ministry of Labor (STPS), verifiable in the public registry. The complete file is available for supplier onboarding.
You received a lot with suspect material and cannot stop the line. Your customer raised a nonconformance and conforming parts must be separated from nonconforming parts before the next shipment. Or the supplier sent a mixed shipment and someone has to sort it part by part.
Sorting—or sorting— is the systematic classification of components, subassemblies, or finished product against defined quality criteria, to separate conforming from nonconforming material and return a clean point of material to the supply chain.
In practice, a sorting service is requested when there is a quality escape: suspect material held at the plant, a customer complaint demanding containment, a supplier lot with a confirmed defect, or a line about to stop. In all these cases, the problem is not just separating parts. It is being able to show afterward — to the customer, to the OEM, in an audit — what was inspected, against which criterion, who did it, and with what result.
That is the difference that defines our service. Our team has 18+ years of experience in Mexico’s automotive corridor. We hold ISO 9001:2015 certification (Orion Registrar, ANAB accredited) and REPSE registration ARR197/2024 with Mexico’s Ministry of Labor (STPS). Our processes are carried out in accordance with our customers’ IATF 16949 requirements.
The standard process is straightforward and without surprises.
We received your RFQ with the operation details: part number, volume, defect to detect, location, required shifts, and estimated duration. With that information we issue a quote with scope, rate, and terms. Upon receipt of the purchase order we schedule the service and assign the personnel.
If your company has not yet onboarded us as a supplier, onboarding can run in parallel; in those cases, a signed quote is enough to avoid delaying the start.
Urgency works differently, and it is worth being clear about it.
When a line is down or about to go down, the RFQ and quote are expedited to the minimum. Before committing, we check three things: actual available capacity, operational risks, and whether it is technically advisable to take the job under those conditions. We do not accept a service we cannot perform to the standard we document.
In most of these cases we already work with the customer inside their plant, and there the response is usually faster: when the operation allows it, we reassign personnel who are already on-site, already onboarded, and familiar with the product. A supervisor is assigned, the event documentation is prepared, OK/NOK visual aids are created, and data recording starts from the first part.
That responsiveness does not come from a promise to mobilize: it comes from already being present at the plant.
Every service runs with a responsible lead and a supervision and coordination structure that verifies the inspector’s work on the floor. We never leave personnel alone at a plant without a chain of command.
Every sorting service generates controlled documentary evidence:
When the scope requires it, we add statistical validation — Cp, Cpk, and Gauge R&R per AIAG MSA 4th edition — to objectively support the release decision.
A well-executed sorting service reduces material sent to scrap, contains the quality escape before it reaches the OEM, frees your production staff from containment tasks, and delivers accurate information on defect behavior to feed root cause analysis.
San Luis Potosí is our operating base. From here we provide sorting services at plants and warehouses in Aguascalientes, Querétaro, Guanajuato, and the rest of the Bajío corridor, with our own transportation to mobilize personnel. Outside San Luis Potosí, start-up is scheduled based on distance, shift, and availability.
The service can be performed at the customer’s plant, at their supplier’s plant, at an external warehouse or distribution center, at our facilities, or at multiple sites in parallel when the entire chain must be cleaned.
It depends on supplier onboarding. With a purchase order issued and active supplier status, we schedule the service for the earliest possible date. Where we already have a presence at your plant, personnel can be reassigned more quickly, subject to the ongoing operation.
Part number, volume, defect description, location, shifts, and estimated duration. With that, we issue a quote.
Yes. We hold REPSE registration ARR197/2024 with Mexico’s Ministry of Labor (STPS), and our IMSS and INFONAVIT contributions are current and verifiable.
Yes. Weekly tactical report and, depending on the service level contracted, a monthly executive report.
Yes, with mobilization from our base in SLP.
Describe the material, the defect, and the volume, and we will send back a proposal with rate, start-up time, and reporting scheme.
RIDYS Group · Av. Universidad 1085, Azteca Norte, 78310 San Luis Potosí, S.L.P. · Phone: 444 171 4514
