The GRS-to-DPP Gap: Why Certificate Presence Is Not Product Proof
Why is a valid GRS Transaction Certificate not proof of a product claim? Documentary compliance asks whether a certificate exists; verification compliance asks whether the certified mass actually supports the declared output quantity. The gap opens when certified input volume is never tied mathematically to garment-level declarations.
Executive Summary
A valid GRS Transaction Certificate does not automatically validate every downstream product claim.
The gap appears when certified input volume is not mathematically tied to garment-level output declarations.
The Core Gap
Documentary compliance asks: "Do we have a certificate?"
Verification compliance asks: "Does certified mass support this exact output quantity and claim?"
Method: Proprietary Textile Conversion Model
Reeco applies a proprietary textile mass-balance model that translates certified input volume (in kilograms) into garment-level allocation limits.
The model accounts for: - Technical textile specifications (weight, usable width, and fabric properties) - Process-specific conversion factors (yield, waste, shrinkage, and handling)
The conversion result is cross-checked against declared units and TC-certified kilograms. Implementation details are not disclosed publicly to preserve competitive advantage.
Mass-Balance Integrity Table
| Input | Computation | Output Check |
|---|---|---|
| Certified TC kg | Converted into allocable mass | Maximum claimable certified output |
| Product BOM and specs | Proprietary textile conversion model and unit quantities | Expected material consumption |
| Declared recycled content | Compared against allocable mass | Pass, warning, or hard block |
Hard Block Logic
When cumulative certified consumption exceeds available certified mass, claim issuance is blocked (RCO003).
No manual override should exist without a new valid TC or corrected production data.
Why This Matters for EU Enforcement
ESPR and Green Claims direction moves toward substantiated, traceable, product-level evidence.
A brand cannot rely on certificate possession if conversion logic is inconsistent at SKU or batch level.
Capabilities Matrix
| Capability | Basic Document Platform | Reeco Approach |
|---|---|---|
| Store GRS certificate | Yes | Yes |
| Validate certificate format | Sometimes | Yes |
| Compute product-level certified mass | Rare | Yes |
| Enforce exhaustion block | Rare | Yes (RCO003) |
| Produce audit trail | Limited | Structured and exportable |
FAQ
Is GRS certificate validation enough?
No. It confirms certificate legitimacy, not product-level claim accuracy.
Why use a proprietary textile conversion model?
It translates textile technical data into auditable mass consumption logic.
What does a hard block prevent?
Over-allocation of certified claims beyond available certified material.