Technical Appendix: Cost Model & Assumptions
Detailed documentation of the mathematical framework, sourcing methodology, and operational assumptions underlying Validora's validation system.
Contents
1. Overhead Percentage Derivation
The 50% overhead allowance is derived from published supplement manufacturing cost structure data (IBISWorld NAICS 325411; Nutrition Business Journal). These sources consistently document raw materials representing 40–60% of COGS in the supplement manufacturing sector.
Converting COGS percentages to overhead-relative-to-ingredient ratios:
Third-party testing costs supporting this range: NSF Certification ($15,000–$75,000/year), Informed Sport ($10,000–$50,000/year), batch HPLC/heavy metals/microbial testing ($500–$2,000/batch). GMP compliance overhead (21 CFR Part 111): $50,000–$500,000/year depending on scale.
2. EXW Baseline Rationale
EXW (Ex Works) pricing is used as the ingredient cost baseline. This reflects the factory-gate price in China before freight, import duties, or domestic logistics costs.
Freight and tariffs are excluded for the following reasons:
- Freight rates vary by brand, carrier, volume, and shipping lane — requiring brand-specific assumptions that cannot be independently verified
- Import duty rates differ by HS code, country of origin rules, and any active trade agreements or tariff schedules
- Including estimated freight without verified figures would introduce greater error than excluding it
- The 50% overhead allowance provides a buffer that accommodates normal logistics variation
- All brands face the same EXW baseline, ensuring cross-brand comparisons are consistent
The model measures manufacturing economics at the ingredient level, not total landed cost. This scope is intentional and disclosed.
3. Rounding & Calculation Standards
| Value | Decimal Places | Example |
|---|---|---|
| Ingredient cost per gram | 4 | $0.0075 |
| Manufacturing cost | 2 | $3.98 |
| Retail price | 2 | $29.99 |
| Markup percentage | 0 (whole number) | 654% |
| Overall score | 1 | 7.8 |
| Variance percentage | 2 | 12.45% |
Authoritative Formulas
All rounding is applied at the display layer only. Internal calculations retain full floating-point precision.
4. Supplier Sourcing Protocol
Baseline Requirements
- Minimum 2 independent verified supplier quotes per ingredient
- Verified platforms only (Alibaba Gold/Verified, Made-in-China, Global Sources)
- 100kg MOQ target quantity
- EXW or FOB pricing (EXW preferred)
- Purity and grade specified per quote
- Evidence documented (screenshots, COA, or pricing PDF)
- Reference price = median of collected quotes
Why 100kg MOQ
All quotes are collected at 100kg MOQ — a small-order quantity relative to what established supplement brands purchase. This is intentional.
Brands buying at volume (500kg–5,000kg+) typically receive 10–50% lower ingredient costs than our quoted baseline. This means Validora's manufacturing cost estimates are conservative by design — understating ingredient costs relative to what large brands actually pay. Real markups at scale are likely higher than what Validora reports.
| Order Quantity | Typical Discount vs. 100kg | Validora Implication |
|---|---|---|
| 100kg | Baseline | Our reference price (conservative) |
| 500kg | 10–20% lower | Mid-size brands pay less |
| 1,000kg+ | 20–35% lower | Established brands pay less |
| 5,000kg+ | 35–50% lower | Major brands pay significantly less |
Conclusion: Because we use small-order pricing as our baseline, Validora gives brands the benefit of the doubt on ingredient cost. This is a conservative, brand-favorable design choice that makes our markup estimates more defensible, not less.
Monitoring Cadence
Quarterly spot checks use 1 new quote per ingredient. A 15% variance threshold determines whether full re-validation is triggered. All price history is retained permanently.
5. 15% Variance Threshold Justification
The 15% threshold for triggering full re-validation was selected to balance sensitivity against operational cost.
- Normal commodity price fluctuation for supplement ingredients: 5–12% quarterly
- A 15% threshold captures genuine market shifts while ignoring routine noise
- Below 15%: quote-to-quote variation attributable to supplier, timing, and negotiation differences
- At or above 15%: suggests a real market movement warranting updated reference data
6. Historical Price Tracking
All ingredient reference prices are versioned. When a reference price is updated, the previous record is archived with its active date range preserved. Records are never deleted. This maintains a complete longitudinal dataset of factory-level ingredient pricing from the first quote collected.
History Fields
validFrom— When this price became activevalidUntil— When this price was retired (null = still active)supersededById— Links to the record that replaced this onechangeReason— Documents why the price was updatedisActive— false = archived, true = current
7. Dispute & Correction Protocol
Brands, researchers, or users who identify factual errors in ingredient pricing, product data, or calculations may submit corrections. All disputes are reviewed against the documented sourcing protocol. If a factual error is confirmed, the affected record is updated and the change is logged with a timestamp and reason.
Methodology disputes (challenging the framework itself, not specific data points) are reviewed on a versioned basis. If a methodological change is warranted, it is applied to the full dataset and the methodology version number is incremented.
Escalation Response Times
- Minor escalation (supplier dispute): resolve within 14 days
- Major escalation (supply shock): resolve within 7 days
Submit corrections to corrections@validora.org with supporting evidence.
8. Methodology Versioning
| Version | Date | Changes |
|---|---|---|
| v1.0 | Feb 2026 | Initial methodology. 50% overhead, 5-tier system, EXW baseline. |
| v1.1 | Feb 2026 | Added quarterly re-verification protocol. 15% variance threshold defined. |
| v2.0 | Feb 2026 | Overhead math derivation added. EXW rationale formalized. Rounding standards defined. Technical Appendix created. Pricing history system implemented. |
| v2.1 | Feb 2026 | Corrected quote count to 2 per ingredient (accurate). Added conservative pricing framing — 100kg MOQ understates brand costs at scale. |
Version numbers follow semantic versioning. Major versions (X.0) indicate changes that affect score calculations. Minor versions (X.Y) indicate documentation clarifications or operational improvements.