Source hierarchy
For safety-sensitive facts we use sources in this strict order:
- CPSC recalls, regulations, and official federal guidance.
- The current manufacturer manual and exact model/SKU documentation.
- Applicable standards or certification-owner documentation.
- Our own dated, reproducible measurements and hands-on observations.
- Retailer listings — for price and availability only, never as the sole source for a safety claim or model identity.
When sources disagree, we show the discrepancy and withhold the affected recommendation until it is resolved. Retailer sources are structurally barred from backing non-pricing facts in our data model.
The evidence-confidence ladder
Every product fact in our records carries one of these states, and our validation tooling enforces each state's minimum evidence before it is published:
- Manufacturer-stated — transcribed from a current official page or manual, with the quote and location recorded.
- Source-verified — checked against a second authoritative source where one exists, or transcribed from an official primary origin such as a CPSC notice.
- Measured — confirmed on the exact unit in hand, citing a dated measurement log.
- Hands-on tested — exercised through the documented testing protocol, citing a dated test log.
- Recommended — an editorial verdict available only through the published scoring method. This status is never inferred from affiliate availability, and our validation rejects any recommendation whose cited facts are not measured or hands-on tested.
Facts we have not verified are labeled Not yet verified and rendered that way in every table — they are never silently filled from retailer copy.
Recall tracking
We maintain a reviewed ledger of official CPSC recall notices for toddler towers and adjacent toddler furniture. A monitor checks official CPSC recall data on a weekly service level and quarantines anything it finds as an immutable candidate for human review — no notice enters the ledger, and no recall state changes, without a documented human decision.
The monitor runs alongside the official CPSC listing and quarantines any new finding for human review before it can enter the ledger. We publish when each entry was last verified, and we always direct readers to CPSC.gov as the authoritative source. We never claim our tool is complete or real-time.
Freshness service levels
Each data class has a review cadence and a maximum age, tracked item by item in a freshness ledger:
- Official recalls and safety notices: checked at least weekly; never older than 14 days.
- Manufacturer manuals and specifications: monthly for recommended models, quarterly for the broader database.
- Price and availability: daily for recommended models where permitted, weekly spot-checks for the catalog.
- Hands-on recommendations: fully re-reviewed at least every six months or on model revision.
- Reader corrections: acknowledged within two business days and investigated against the source hierarchy.
Safety-class data that exceeds its maximum age is flagged for review and is not published until it is refreshed.
Minimum recommendation protocol
A model may exist in the database from sourced facts alone, but it can receive a recommendation only after the exact model has completed all of the following:
- Manual and model-identity verification, including SKU/revision or date code.
- Assembly with time, tool, fastener, and ambiguity notes.
- Dimensional checks and platform-height verification.
- Tip, wobble, step-access, fold-lock, pinch-point, and guard observations under a documented, non-destructive protocol.
- Cleaning, moving, folding, and storage checks.
- A recall search on the publication date and a recorded recheck schedule.
- A conflict-of-interest record covering purchase, loan, sample, sponsorship, and affiliate relationships.
This is comparative editorial testing, not laboratory certification. We say “more stable in our protocol,” not “safe” or “certified,” unless an authoritative source supports the exact claim.
How we treat certification claims
CPSC does not pre-approve products. Manufacturers and importers issue their own Children's Product Certificates based on third-party testing. When a seller claims a certification, we request the actual certificate or test report — rule numbers, exact tested SKU and revision, laboratory, and test date — and we store the claim as an attributed statement until those documents are reviewed. Our comparison tables label this column “Certification claims” for exactly that reason.
Corrections
If you find an error — a spec, an identity, a recall state, anything — email info@hiddenwork.dev. We acknowledge within two business days, investigate against the source hierarchy, and publish a visible correction when material. Because pages render from shared records, one corrected record updates the finder, the comparison tables, and every article that cites it. See also the editorial policy.