Third-party quality services means hiring a specialized external provider to perform product verification, containment, or recovery operations that the plant cannot or should not absorb with its own workforce.
It is not supplying personnel. It is hiring a service with a defined scope, documented criteria, our own supervision, and agreed deliverables.
That distinction, which was previously a preference, is now a legal obligation.

The subcontracting reform prohibited supplying personnel and allowed only the subcontracting of specialized services, which must be registered with Mexico’s Ministry of Labor (STPS).
In practice, this means that if a plant hires a provider without a current REPSE (Mexico’s Registry of Specialized Service Providers) registration to place people on its floor, the plant is exposed to joint liability for that personnel’s labor and social security obligations, and the expense may not be tax-deductible.
RIDYS Group operates with REPSE (Mexico’s Registry of Specialized Service Providers) registration ARR197/2024, verifiable in the STPS public registry, with the corporate purpose and registered activities matching the services it provides.
A specialized third-party quality service has four elements that simply placing people does not.
Defined scope. What is inspected, against which criterion, and until when. Not “three people per shift” but “100% verification of characteristic X until the exit criterion is met.”
Documented criterion. A signed work instruction, with physical limit samples when the defect is visual. Without it, each inspector applies their own judgment.
Our own supervision. The provider is accountable for its people’s performance. The plant supervisor does not direct the external personnel.
Deliverables. Per-shift report, identified material, segregation of nonconforming parts, and the information the customer needs for its analysis.
When the verification volume is temporary and does not justify hiring staff. When the customer has imposed a containment or controlled shipping condition that must be met immediately. When the plant needs additional capacity without diverting its own quality team. Or when the protocol requires verification by a third party independent of the supplier, as in CS2.
Inspection, part sorting, rework, GP12, CS1 and CS2, resident quality engineers, contract assembly and subassembly, and quality consulting. View All Quality Services
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